Dolphin E10 question

[WTR(WestTexasRanger)]

My robot doesn’t appear to be cleaning as well as it did earlier in the season.

When I was cleaning the filter (ultra fine) and putting the unit away for the day, I noticed the rubber “flap” that’s on the back of the unit is attached at the top and loose at the bottom. You can see the filter through the gap.

Is this area supposed to be open?

 

[GrandizerGo]

I have a gap in mine but can't say if this is normal as I never looked before. I noticed my ultra fine filter not cleaning as well this season as well. I switched to the original filter which seemed much better. I've deep cleaned my ultra fine filters but haven't swapped them back in yet.

 

[WTR(WestTexasRanger)]

I’m thinking that the gap may be part of the “rapid water release” feature mentioned in one of the Maytronics videos.