BUG at SONOFF Smart Motion Detector SNZB-03 (zigbee)

I am very satisfied with my “SONOFF Smart Motion Detector SNZB-03 (zigbee)”.
But there is a very annoying bug, motion is shown even though there is no motion in the detection space.
I have the impression that the cases are actually increasing at the moment. The light is switched on several times during the night even though we are all in bed and the motion detector is in the hallway. The door to the hallway is closed.
Does anyone still have this observation and what can I do about it.