What forces are at work here?

[lars]

As we all know, mid to late 80's DOD pedals are famous for the battery door to disappear into another dimensional void. Nobody ever seems to be able to keep track of them. Well, I ordered a replacement door since there are many sellers making new ones with 3D printers. The guy dropped it off at the post office, and it proceeded to disappear in the mail. Reverb just says, "status unknown". So apparently even the replacement doors suffer from being sucked into the same void! It's a lose, lose situation.