Martian destination 0.0.0.0

I find already for a couple of months multiple of these messages in the syslog and messages files.

Aug 14 21:21:53 rpi3 kernel: [20902.701844] IPv4: martian destination 0.0.0.0 from 192.168.178.33, dev wlan0
Aug 15 21:21:53 rpi3 kernel: [23902.701844] IPv4: martian destination 0.0.0.0 from 192.168.178.30, dev wlan0

Both IP-addresses (192.168.178.3[03]) happen to be ESP32’s loaded with ESPhome and both configured as a BLE gateway.
I have over 50 or so IP components in the network, but it is these two that produce these “martian storms”.
I’m not a network expert, but all my network devices pickup the network configuration through DHCP (pihole), but for these 2 I also tried static IP, but that has no effect.
Anyone who has an idea ? Thank you, Yann

What is the yaml for those esp devices (just one should do)

# These substitutions allow the end user to override certain values
substitutions:
  name: "ble-gtway33"

esphome:
  name: "${name}" 
  platform: ESP32
  board: wemos_d1_mini32


# Enable logging
logger:

# Enable Home Assistant API
api:

ota:
  password: "372979d3f8d7f46f08c1daf4a4057810"

wifi:
  networks:
    - ssid: !secret wifi1_ssid 
      password: !secret wifi1_passwd
    - ssid: !secret wifi2_ssid 
      password: !secret wifi2_passwd
  domain: .lan
      # manual_ip:
      #   static_ip: 192.168.178.33
      #   gateway: 192.168.178.1
      #   subnet: 255.255.255.0

  # Enable fallback hotspot (captive portal) in case wifi connection fails
  ap:
    ssid: "${name} Fallback Hotspot"
    password: !secret AP_password

captive_portal:

time:
  - platform: homeassistant
  
esp32_ble_tracker:

switch:
  - platform: gpio
    name: "${name}-Onboard-LED"
    pin: 2
    inverted: True

  - platform: restart
    name: "${name}-restart"
    id: restart_switch

sensor:
  - platform: uptime
    name: "${name}-Uptime Sensor"
    
  - platform: wifi_signal
    name: "${name}-WiFi_Signal"

# watchout, different sensor, different platform
  - platform: atc_mithermometer
    mac_address: "A4:C1:38:DB:FB:2D"
    temperature:
      name: "${name}-ATC_DBFB2D_temperature"
    humidity:
      name: "${name}-ATC_DBFB2D_humidity"
    battery_level:
      name: "${name}-ATC_DBFB2D_battery_level"
    battery_voltage:
      name: "${name}-ATC_DBFB2D_voltage"
    signal_strength:
      name: "${name}-ATC_DBFB2D_signal"

  - platform: atc_mithermometer
    mac_address: "a4:c1:38:b0:08:b0"
    temperature:
      name: "${name}-ATC_B008B0_temperature"
    humidity:
      name: "${name}-ATC_B008B0_humidity"
    battery_level:
      name: "${name}-ATC_B008B0_battery_level"
    battery_voltage:
      name: "${name}-ATC_B008B0_voltage"
    signal_strength:
      name: "${name}-ATC_B008B0_signal"