Wyze Robot Vacuum not finishing the area clean

Yesterday, One of WRV’s stopped and returned to base after cleaning about 60 % of the area which it normally has no trouble cleaning in one charge. It is a scheduled weekly clean.
And it did not resume cleaning either. It just didn’t finish the area.

Another one of my WRV’s today was found sleeping in the middle of weekly scheduled area clean today.

What is happening?

Hi edhchoe, could you please submit a log and tell me the Log Number. I will let engineers investigate it.