Hello, thanks for this great plugin.
Yet, there seems to be an issue, with all of my sensors. I have the LYWSD02, mi flora and mijia round sensors.
The problem is that after a couple of hours it stops getting new information, a reboot temporarily fixes this. I have tried your latest release and even your 0.5.3 beta, but both have the same issue.

Here is my config:
sensor:

• platform: mitemp_bt
  rounding: True
  decimals: 1
  period: 60
  log_spikes: False
  use_median: False
  active_scan: False
  hci_interface: 0