Of course I can’t prove it and I never had an issue wirh the bottom mosule myself (only had my display replaced once over a year ago) but I do have the impression the FP2 is reacting sensitive when being carried in a trousers pocket, probably due to bending and/or humidity.
Since I have my new display I carry the FP2 in a belt pouch (I’m fine with the Feuerwear Mitch 10, alternatives see this thread) and do not have any issues.
This is just a guess though based on my reading on the forum.