I had a battery (1 of 4, and the originally that shipped with my P3P) show similar signs of cell imbalance.
I did a deep discharge, to about 8%, and a recharge to 100%. Since then, only a slight imbalance has remained. Think it has 30 or so cycles on it.
Im still a little tentative with it, and use it for my "first flight of the day" which is usually a shorter scout/test run to make sure everything is working as expected before getting into the fun stuff.
Ive found that range is slightly reduced over my other batteries, so I usually don't use it for long range or full-UAS flights.
Is what it is. In a perfect world, I'd probably ditch it for another new battery, but since I almost always do my "short test flight" first anyway, I've worked it into my flight plans.