Callmonitor sensor permanently "open" (repost in English)

Hello,  
I’m new to Homebridge, GitHub, etc., so I hope this question hasn’t been answered a hundred times already.  

Anyway, I tried setting up a call monitor, and it worked. However, the sensor displayed in the Home app stays permanently open (Homebridge status 1) once it detects a call and doesn’t return to closed until I restart Homebridge.  

Thanks a lot for your help!


