Sleep analyzer does not regognice sleep after a pee brake.

I have two units of SA, both me and my wife. We both weigh about 80 kg and the SA have given results quite alike Oura rings. On night before 14.6. the SA give no results to my sleep. I resetted the divedce to factory settings. Next night SA measured only two hours before my pee brake, but not the rest of my night. My wife's SA start to operate the same way. So I wonder have you made any changes to the settings of the SA?
When I put on the increase sensivity on, the device started to operate normaly, but I have monitored situation only one night.
When the latest uppdate to the firmware have been made?