There would be no reaction - the bag is made of LDPE (low density polyethylene), it's 100% inert.
The finish, however, may not be . . .
Myself, it's stored in tune, in a climactically reasonable space, in a hardshell case (absolutely *NOT* a gigbag which is neither air or other contaminant tight) so that any temp/humidity changes are moderated by the case..