Vaccum pausing after finishing cleaning mop

Vaccum won’t continue the cycle to charging after cleaning mops, instead it pauses and it stays paused. This is been happening for the past 2 weeks. Is this happening to anyone ? What can I do?

Have the 40x ultra
Pad was getting struck had to go get it and return to dock.  
I decided to change the pads, wipe all sensors, took back to dock to have. Been charging for 3 days won’t come out.  Says it off line. Changed position of the plug still not working.  Suggestions to get working again.