I have a similar problem with my 522. I have a thin piece of tagboard or matchbook cover wedged in on top of my chip, between the outside of the chip and the plastic over it. This seems to solve the problem for me.
I had it out with lowrance over this issue in may with the same outcome, can’t fix it but will be mor than happy to take another pile of cash of your hands-100% B.S.
Hope this fixes it for you.
Bryce