The filter bag may not be mounted properly. Please check to see if the filter bag is secure.
Check the intake valves on the bottom lid. See if they move freely. If they do not move freely, clean or replace the filter bag. The intake valves have to move freely.
Pull the robot out of the water. Once pulled out of the water the intake valves should shut. If the intake valves do not close, or move freely once out of the water, the bottom lid will need to be replaced.