Gauge/sensor not updating?

I have a sensor (SDM_meter) displaying in a Dashboard Gauge. The only way I have found to get the gauge to update is to leave esphome log window open in one HA session while the gauge is showing in another HA session?
The log seems (to me) to be sending/receiving traffic every 10 second as programmed but as mentioned above, unless the log is running, the gauge does not update. I am sure that when I first wrote this .yaml that it worked as expected!

My .yaml

esphome:
  name: "esp32-sdm230m"
  platform: esp32
  board: esp32doit-devkit-v1

# Enable logging
logger:
  baud_rate: 0
  level: VERBOSE

api:

ota:
  password: !secret ota_password
  id: my_ota_pw

wifi:
  ssid: !secret wifi_ssid
  password: !secret wifi_password

uart:
  - id: uart_2
    # RX/TX are swopped to make PCB layout easer.
    tx_pin: GPIO16 #marked as RX2 on DOIT DEVKIT V1
    rx_pin: GPIO17 #marked as TX2.
    baud_rate: 9600
    stop_bits: 1
    parity: none

modbus:
  uart_id: uart_2
  id: modbus1
  #No flow control required because using UART/RS485 module
  #flow_control_pin: GPIO18 #marked as D18 on DOIT DEVKIT V1

modbus_controller:
  - id: sdm230m
    address: 0x01
    modbus_id: modbus1
    update_interval: 10s

sensor:
  - platform: sdm_meter

    phase_a:
      current:
        name: "ESP32.SDM230M Current"
      voltage:
        name: "ESP32.SDM230M Voltage"
      active_power:
        name: "ESP32.SDM230M Active Power (P)"
        force_update: true
      apparent_power:
        name: "ESP32.SDM230M Apparent Power (S)"
      reactive_power:
        name: "ESP32.SDM230M Reactive Power (Q)"
      power_factor:
        name: "ESP32.SDM230M Power Factor"
      phase_angle:
        name: "ESP32.SDM230M Phase Angle"
        
    frequency:
      name: "ESP32.SDM230M Frequency"
    total_power:
      name: "ESP32.SDM230M Total Power"
    import_active_energy:
      name: "ESP32.SDM230M Import Active Energy"
    export_active_energy:
      name: "ESP32.SDM230M Export Active Energy"
    import_reactive_energy:
      name: "ESP32.SDM230M Import Reactive Energy"
    export_reactive_energy:
      name: "ESP32.SDM230M Export Reactive Energy"
    
    update_interval: 10s
 
switch:
  - platform: restart
    name: "ESP32_SDM230m Restart"

… and a log sample:

INFO ESPHome 2023.5.5
INFO Reading configuration /config/esphome/esp32-sdm230m.yaml...
INFO Starting log output from esp32-sdm230m.local using esphome API
INFO Successfully connected to esp32-sdm230m.local
[07:41:26][I][app:102]: ESPHome version 2023.5.5 compiled on Jun 11 2023, 07:30:34
[07:41:26][C][wifi:505]: WiFi:
[07:41:26][C][wifi:363]:   Local MAC: EC:62:60:9D:B3:48
[07:41:26][C][wifi:364]:   SSID: 'myAP1'[redacted]
[07:41:26][C][wifi:365]:   IP Address: 192.168.0.136
[07:41:26][C][wifi:367]:   BSSID: 44:E9:DD:6E:71:6C[redacted]
[07:41:26][C][wifi:368]:   Hostname: 'esp32-sdm230m'
[07:41:26][C][wifi:370]:   Signal strength: -62 dB ▂▄▆█
[07:41:26][V][wifi:372]:   Priority: 0.0
[07:41:26][C][wifi:374]:   Channel: 6
[07:41:26][C][wifi:375]:   Subnet: 255.255.255.0
[07:41:26][C][wifi:376]:   Gateway: 192.168.0.1
[07:41:26][C][wifi:377]:   DNS1: 192.168.0.1
[07:41:26][C][wifi:378]:   DNS2: 0.0.0.0
[07:41:26][C][logger:301]: Logger:
[07:41:26][C][logger:302]:   Level: VERBOSE
[07:41:26][C][logger:303]:   Log Baud Rate: 0
[07:41:26][C][logger:305]:   Hardware UART: UART0
[07:41:26][C][uart.arduino_esp32:124]: UART Bus 0:
[07:41:26][C][uart.arduino_esp32:125]:   TX Pin: GPIO16
[07:41:26][C][uart.arduino_esp32:126]:   RX Pin: GPIO17
[07:41:26][C][uart.arduino_esp32:128]:   RX Buffer Size: 256
[07:41:26][C][uart.arduino_esp32:130]:   Baud Rate: 9600 baud
[07:41:26][C][uart.arduino_esp32:131]:   Data Bits: 8
[07:41:26][C][uart.arduino_esp32:132]:   Parity: NONE
[07:41:26][C][uart.arduino_esp32:133]:   Stop bits: 1
[07:41:27][C][modbus:143]: Modbus:
[07:41:27][C][modbus:145]:   Send Wait Time: 250 ms
[07:41:27][C][modbus:146]:   CRC Disabled: NO
[07:41:27][C][modbus_controller:275]: ModbusController:
[07:41:27][C][modbus_controller:276]:   Address: 0x01
[07:41:27][C][modbus_controller:278]: sensormap
[07:41:27][C][modbus_controller:284]: ranges
[07:41:27][C][sdm_meter:087]: SDM Meter:
[07:41:27][C][sdm_meter:088]:   Address: 0x01
[07:41:27][C][sdm_meter:093]:   Phase A
[07:41:27][C][sdm_meter:094]:     Voltage 'ESP32.SDM230M Voltage'
[07:41:27][C][sdm_meter:094]:       Device Class: 'voltage'
[07:41:27][C][sdm_meter:094]:       State Class: 'measurement'
[07:41:27][C][sdm_meter:094]:       Unit of Measurement: 'V'
[07:41:27][C][sdm_meter:094]:       Accuracy Decimals: 2
[07:41:27][C][sdm_meter:095]:     Current 'ESP32.SDM230M Current'
[07:41:27][C][sdm_meter:095]:       Device Class: 'current'
[07:41:27][C][sdm_meter:095]:       State Class: 'measurement'
[07:41:27][C][sdm_meter:095]:       Unit of Measurement: 'A'
[07:41:27][C][sdm_meter:095]:       Accuracy Decimals: 3
[07:41:27][C][sdm_meter:096]:     Active Power 'ESP32.SDM230M Active Power (P)'
[07:41:27][C][sdm_meter:096]:       Device Class: 'power'
[07:41:27][C][sdm_meter:096]:       State Class: 'measurement'
[07:41:27][C][sdm_meter:096]:       Unit of Measurement: 'W'
[07:41:27][C][restart:068]: Restart Switch 'ESP32_SDM230m Restart'
[07:41:27][C][restart:070]:   Icon: 'mdi:restart'
[07:41:27][C][restart:091]:   Restore Mode: always OFF
[07:41:27][C][mdns:108]: mDNS:
[07:41:27][C][mdns:109]:   Hostname: esp32-sdm230m
[07:41:27][V][mdns:110]:   Services:
[07:41:27][V][mdns:112]:   - _esphomelib, _tcp, 6053
[07:41:27][V][mdns:114]:     TXT: version = 2023.5.5
[07:41:27][V][mdns:114]:     TXT: mac = ec62609db348
[07:41:27][V][mdns:114]:     TXT: platform = ESP32
[07:41:27][V][mdns:114]:     TXT: board = esp32doit-devkit-v1
[07:41:27][V][mdns:114]:     TXT: network = wifi
[07:41:27][C][ota:093]: Over-The-Air Updates:
[07:41:27][C][ota:094]:   Address: esp32-sdm230m.local:3232
[07:41:27][C][ota:097]:   Using Password.
[07:41:27][C][api:138]: API Server:
[07:41:27][C][api:139]:   Address: esp32-sdm230m.local:6053
[07:41:27][C][api:143]:   Using noise encryption: NO
[07:41:35][V][modbus:199]: Modbus write: 01.04.00.00.00.50.F0.36 (8)
[07:41:35][V][modbus_controller:158]: Updating modbus component
[07:41:35][V][modbus:042]: Modbus received Byte  1 (0X1)
[07:41:35][V][modbus:042]: Modbus received Byte  4 (0X4)
[07:41:35][V][modbus:042]: Modbus received Byte  160 (0Xa0)
[07:41:35][V][modbus:042]: Modbus received Byte  67 (0X43)
[07:41:35][V][modbus:042]: Modbus received Byte  107 (0X6b)
[07:41:35][V][modbus:042]: Modbus received Byte  202 (0Xca)
[07:41:35][V][modbus:042]: Modbus received Byte  143 (0X8f)
[07:41:35][V][modbus:042]: Modbus received Byte  0 (0X0)
[07:41:35][V][modbus:042]: Modbus received Byte  0 (0X0)
[07:41:35][V][modbus:042]: Modbus received Byte  0 (0X0)
[07:41:35][V][modbus:042]: Modbus received Byte  0 (0X0)
[07:41:35][V][modbus:042]: Modbus received Byte  0 (0X0)
[07:41:35][V][modbus:042]: Modbus received Byte  0 (0X0)
[07:41:35][V][modbus:042]: Modbus received Byte  0 (0X0)
[07:41:35][V][modbus:042]: Modbus received Byte  0 (0X0)
[07:41:36][V][modbus:042]: Modbus received Byte  62 (0X3e)
[07:41:45][V][modbus:199]: Modbus write: 01.04.00.00.00.50.F0.36 (8)
[07:41:45][V][modbus_controller:158]: Updating modbus component
[07:41:45][V][modbus:042]: Modbus received Byte  1 (0X1)
[07:41:45][V][modbus:042]: Modbus received Byte  4 (0X4)
[07:41:45][V][modbus:042]: Modbus received Byte  160 (0Xa0)
[07:41:45][V][modbus:042]: Modbus received Byte  67 (0X43)
[07:41:45][V][modbus:042]: Modbus received Byte  108 (0X6c)
[07:41:45][V][modbus:042]: Modbus received Byte  26 (0X1a)
[07:41:45][V][modbus:042]: Modbus received Byte  51 (0X33)
[07:41:45][V][modbus:042]: Modbus received Byte  0 (0X0)
[07:41:45][V][modbus:042]: Modbus received Byte  0 (0X0)
[07:41:45][V][modbus:042]: Modbus received Byte  0 (0X0)
[07:41:45][V][modbus:042]: Modbus received Byte  0 (0X0)
[07:41:45][V][modbus:042]: Modbus received Byte  0 (0X0)
[07:41:45][V][modbus:042]: Modbus received Byte  0 (0X0)
[07:41:45][V][modbus:042]: Modbus received Byte  0 (0X0)
[07:41:45][V][modbus:042]: Modbus received Byte  0 (0X0)
[07:41:45][V][modbus:042]: Modbus received Byte  62 (0X3e)
[07:41:46][V][modbus:042]: Modbus received Byte  47 (0X2f)
[07:41:46][V][sensor:043]: 'ESP32.SDM230M Frequency': Received new state 49.902534
[07:41:55][V][modbus:199]: Modbus write: 01.04.00.00.00.50.F0.36 (8)
[07:41:55][V][modbus_controller:158]: Updating modbus component
[07:41:55][V][modbus:042]: Modbus received Byte  1 (0X1)
[07:41:55][V][modbus:042]: Modbus received Byte  4 (0X4)
[07:41:55][V][modbus:042]: Modbus received Byte  160 (0Xa0)
[07:41:55][V][modbus:042]: Modbus received Byte  67 (0X43)
[07:41:55][V][modbus:042]: Modbus received Byte  108 (0X6c)
[07:41:55][V][modbus:042]: Modbus received Byte  15 (0Xf)
[07:41:55][V][modbus:042]: Modbus received Byte  197 (0Xc5)
[07:41:55][V][modbus:042]: Modbus received Byte  0 (0X0)
[07:41:55][V][modbus:042]: Modbus received Byte  0 (0X0)
[07:41:55][V][modbus:042]: Modbus received Byte  0 (0X0)
[07:41:55][V][modbus:042]: Modbus received Byte  0 (0X0)
[07:41:55][V][modbus:042]: Modbus received Byte  0 (0X0)
[07:41:55][V][modbus:042]: Modbus received Byte  0 (0X0)
[07:41:56][V][modbus:042]: Modbus received Byte  0 (0X0)
[07:41:56][V][modbus:042]: Modbus received Byte  0 (0X0)
[07:41:56][V][modbus:042]: Modbus received Byte  61 (0X3d)
[07:41:56][V][sensor:043]: 'ESP32.SDM230M Voltage': Received new state 236.061600
[07:42:05][V][modbus:199]: Modbus write: 01.04.00.00.00.50.F0.36 (8)
[07:42:05][V][modbus_controller:158]: Updating modbus component
[07:42:05][V][modbus:042]: Modbus received Byte  1 (0X1)
[07:42:05][V][modbus:042]: Modbus received Byte  4 (0X4)
[07:42:05][V][modbus:042]: Modbus received Byte  160 (0Xa0)
[07:42:05][V][modbus:042]: Modbus received Byte  67 (0X43)
[07:42:05][V][modbus:042]: Modbus received Byte  108 (0X6c)
[07:42:05][V][modbus:042]: Modbus received Byte  218 (0Xda)
[07:42:05][V][modbus:042]: Modbus received Byte  200 (0Xc8)
[07:42:05][V][modbus:042]: Modbus received Byte  0 (0X0)
[07:42:05][V][modbus:042]: Modbus received Byte  0 (0X0)
[07:42:05][V][modbus:042]: Modbus received Byte  0 (0X0)
[07:42:05][V][modbus:042]: Modbus received Byte  0 (0X0)
[07:42:05][V][modbus:042]: Modbus received Byte  0 (0X0)
[07:42:05][V][modbus:042]: Modbus received Byte  0 (0X0)
[07:42:05][V][modbus:042]: Modbus received Byte  0 (0X0)
[07:42:05][V][modbus:042]: Modbus received Byte  0 (0X0)
[07:42:06][V][modbus:042]: Modbus received Byte  62 (0X3e)
[07:42:15][V][modbus:199]: Modbus write: 01.04.00.00.00.50.F0.36 (8)
[07:42:15][V][modbus_controller:158]: Updating modbus component
[07:42:15][V][modbus:042]: Modbus received Byte  1 (0X1)
[07:42:15][V][modbus:042]: Modbus received Byte  4 (0X4)
[07:42:15][V][modbus:042]: Modbus received Byte  160 (0Xa0)
[07:42:15][V][modbus:042]: Modbus received Byte  67 (0X43)
[07:42:15][V][modbus:042]: Modbus received Byte  109 (0X6d)
[07:42:15][V][modbus:042]: Modbus received Byte  6 (0X6)
[07:42:15][V][modbus:042]: Modbus received Byte  111 (0X6f)
[07:42:15][V][modbus:042]: Modbus received Byte  0 (0X0)
[07:42:15][V][modbus:042]: Modbus received Byte  0 (0X0)
[07:42:15][V][modbus:042]: Modbus received Byte  0 (0X0)
[07:42:15][V][modbus:042]: Modbus received Byte  0 (0X0)
[07:42:15][V][modbus:042]: Modbus received Byte  0 (0X0)
[07:42:15][V][modbus:042]: Modbus received Byte  0 (0X0)
[07:42:15][V][modbus:042]: Modbus received Byte  0 (0X0)
[07:42:15][V][modbus:042]: Modbus received Byte  0 (0X0)
[07:42:15][V][modbus:042]: Modbus received Byte  62 (0X3e)
[07:42:16][V][modbus:042]: Modbus received Byte  156 (0X9c)
[07:42:25][V][modbus:199]: Modbus write: 01.04.00.00.00.50.F0.36 (8)
[07:42:25][V][modbus_controller:158]: Updating modbus component
[07:42:25][V][modbus:042]: Modbus received Byte  1 (0X1)
[07:42:25][V][modbus:042]: Modbus received Byte  4 (0X4)
[07:42:25][V][modbus:042]: Modbus received Byte  160 (0Xa0)
[07:42:25][V][modbus:042]: Modbus received Byte  67 (0X43)
[07:42:25][V][modbus:042]: Modbus received Byte  109 (0X6d)
[07:42:25][V][modbus:042]: Modbus received Byte  19 (0X13)
[07:42:25][V][modbus:042]: Modbus received Byte  156 (0X9c)
[07:42:25][V][modbus:042]: Modbus received Byte  0 (0X0)
[07:42:25][V][modbus:042]: Modbus received Byte  0 (0X0)
[07:42:25][V][modbus:042]: Modbus received Byte  0 (0X0)
[07:42:25][V][modbus:042]: Modbus received Byte  0 (0X0)
[07:42:25][V][modbus:042]: Modbus received Byte  0 (0X0)
[07:42:25][V][modbus:042]: Modbus received Byte  0 (0X0)
[07:42:25][V][modbus:042]: Modbus received Byte  0 (0X0)
[07:42:25][V][modbus:042]: Modbus received Byte  0 (0X0)
[07:42:26][V][modbus:042]: Modbus received Byte  62 (0X3e)

Any suggestions to help understand/resolve the problem, eagerly accepted :grinning:
Regards, Martin