weapons aren't disappearing, but hovering over a slot says it doesn't have anything in it, even when there's something in it.
likely just a weird interaction between my pile of mods, but with my setup all i do is add MIDAS to a ship, swap to another ship, strip it and then mount stuff in it and hovering over the slots says they're empty, when there's actually a weapon there. first screenshot.
my best guess is the version i have is actually trying to add this armor module described in the midas description, and since the ship i'm mounting it on doesn't have a module defined for that, bugs out a bit in the refit screen