Understanding the ESP32 camera web server, takes pictures and without being asked

ESPHome
1

Greetings!
I have an ESP32-WROOVER board to which I have attached a simple Ultrasonic range reader inorder to read the waterlevel in my irrigation tank.

Here is my current YAML

esphome:
  name: balsat-mainframe
  friendly_name: BalSAT MainFrame

esp32:
  board: esp32dev
  framework:
    type: arduino

# Enable logging
logger:

# Enable Home Assistant API
api:
  encryption:
    key: "-----"

ota:


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

  # Enable fallback hotspot (captive portal) in case wifi connection fails
  ap:
    ssid: "Esphome-Web-A818D8"
    password: "QGmIQDy37XeU"

captive_portal:

sensor:
  - platform: ultrasonic
    trigger_pin: GPIO12
    echo_pin: GPIO14
    name: "Ultrasonic Sensor"

esp32_camera:
  name: My Camera
  external_clock:
    pin: GPIO21
    frequency: 20MHz
  i2c_pins:
    sda: GPIO26
    scl: GPIO27
  data_pins: [GPIO4, GPIO5, GPIO18, GPIO19, GPIO36, GPIO39, GPIO34, GPIO35]
  vsync_pin: GPIO25
  href_pin: GPIO23
  pixel_clock_pin: GPIO22

  # Image settings

  resolution: FHD
  jpeg_quality: 10

  # ...
esp32_camera_web_server:
  - port: 8080
    mode: stream
  - port: 8081
    mode: snapshot

What I dont understand is why it takes a picture ~10 seconds, is it the idle_framerate and in that case, what should I set it to? I tried setting it to 0 fps but it still takes a picture every 10 seconds or so.

Thank you