Disconnected point temperature (Xiaomi BLE -> ESP32home)

Hi,

I’m using temperature from BLE via an esp32home. For all (5+) that working super well from >2years+. On specific one, month ago I don’t understand why but I got disconnected point.
If the temperature value change “quickly” I have all point (as you can see at the beginning of the history)

If I zoom (history) I see strange value, without explanation

Did you know what the hell I have?

Thanks in advance for your help