Had this hitbox bug 3 times.
While playing germany, my 3rd age monestary (Regnitz Chapel) got destroyed.
After it was destroyed I wanted to secure the 3 relics, however I couldnt select them as the monestary overlapped with the hitbox. Only after finding the exact pixel, was I able to secure 2, 1 was completely unselectable.
HOW TO REPRODUCE:
Build Regnitz Chapel → put relics inside Regnitz Chapel → destroy Regnitz Chapel → attempt to pick up spawned relics with monk