imported post
OP wrote, "I have a PA LTCF. Can I get in trouble for this accidental behavior?"
Open carry is not illegal throughout the Commonwealth, except in Philadelphia where one must have an LTCF in order to do so.
Since you already have an LTCF, you can either open carry or concealed carry anywhere in the Commonwealth - it doesn't matter. If you're carrying concealed and the handgun is accidentally exposed, it doesn't matter. You've got an LTCF, so you're covered, even if the handgun isn't.