WRV turned off in the middle of the night

The vacuum announced loudly “Turning off due to inactivity” in the middle of the night scaring me.
The vacuum is being used everyday for scheduled cleaning.
I have two WRV and only one of them turned itself off in the middle of the night.
I had to manually turn it on in the morning.
Can I turn this feature off?
I don’t want it to randomly turn off.

Was the vac being docked? If it doesn’t connect to charging station for a long time, it will turn off itself and announce that.

It was on the charger when this happened.
When I pressed the power button in the morning, it reconnected to the App and the charge level was 100%.