False detection in every 55 minutes with Lumi Motion Sensors

[tosion]

Describe the bug

I have a strange behavior with couple Xiaomi Mi Smart Home Occupancy Sensors. They are outside in my summer cabin and when detected movement security cameras send me a notification of the area. I have got false detection but I have thought that they are just because of sun or other reasons. Until now: I realized the false detection follow a pattern – they appear in every 55 minutes when they start but they don’t detect all the time (a pic below). I do not know any reason for that. I have more of those same sensors in summer cabin and home which do not follow this pattern. Any idea what is going on here?

Below logs for two identical LUMI sensors: Motion11 without false positives and Motion12 with false positives. Every 55 minutes I can see two identical logs (in blue below). In addition to Motion12 (red below) a log with “presence”:true following one what I did not copy with “presence”:false. Very same time with this red log I get the false detection.

So what should I think about this: there is maybe an update in every 55 minutes which causes these false detection but how to get rid of them is the Question.

Steps to reproduce the behavior

Expected behavior

Environment

• Host system: NUC
• Running method: Home Assistant deCONZ Add-on
• Firmware version: (26xxyy00)
• deCONZ version: 2.19.1
• Device: ConBee II
• Do you use an USB extension cable: yes
• Is there any other USB or serial devices connected to the host system? If so: Eaton UPS

deCONZ Logs

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Additional context

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