If it was doing it and stopped, something's wrong and either the company doesn't know how to diagnose it, or it doesn't want to fix the problem, or more likely both. I got the run-around from Dolphin when the same thing happened to me. Their tech actually, in all seriousness, suggested I attach lead weights to my unit! They even sent me a couple.
Lead weights, in pool water, that my children and their friends swim in. Not happening--I'll vacuum by hand first!
The problem was obvious: the suction motor assembly wasn't working correctly and they needed to replace it.
HOWEVER: While I don't know Aquabot, I do know that all of the brands of that type use the angled handle system for the same reason. If it's not angled correctly, and locked into place, it may not do anything related to wall-climbing correctly. So check that as well.
Good luck!
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