May be irrelevant, and bit out of left field as a guess, but when did you last clean the sensors ?
Could there be small obstruction or something lightly coating 1 of the sensors on the right side that occludes it slightly, and could feasibly make...
Hmmm Props all good? sensors look right?
Take it somewhere with room, put the Drone in sport mode and if the drone starts acting right you may have a sensor thing.
Hey, it's a good idea. Breeding them could be way cheaper than buying new ones all the time. And if you don't use 'em, make an omelette or something. Might be a little crunchy, though.