I have an odd problem. Nine LYWSD03MMC sensors with latest 4.5 firmware on them. 4 are on top floor and 5 in ground floor of the house. I also have two ESP32 flashed with Bluetooh Proxy. One for each floor (in middle of hallways). Default configuration for them:

esp32_ble_tracker:
  scan_parameters:
    interval: 1100ms
    window: 1100ms
    active: true

bluetooth_proxy:
  active: true

All nine sensors have default configuration. I only changed the protocol to BTHome v2. Home assistant picked them all up automatically under BTHome integration up to 60 seconds after I changed the protocl and saved configuration. And it started collecting data.

But two of the (on top floor) are giving me issues. There are gaps between collection and Home Assistant will show unavailable status for them when he doesn't get regular updates.

Here are all with current values:

And graph for one without issues:

And graphs for the two problematic ones:

I did change the batteries on both problematic sensors and it is the same with new batteries.

How to debug this? Bluetooth Proxy is not picking them up? Only one proxy would be enough or I need more then two? I need different ESPHome Bluetooth Proxy configuration or maybe I need to change setting on the temperature sensors?

Thank you for any suggestions.