despite the warning 'this cannot be deployed in caves', it is possible to force deploy a personal cache in a cave, where it behaves as usual. leaving the cave will case it to despawn, and you will no longer be able to recover it to vault, nor be able to deploy it elsewhere.
STEPS TO REPRODUCE:
- go into a cave
- open vault
- click on personal cache, ignoring warning
- right click and deploy
- leave the cave
- attempt to recall cache to vault (fails, 'depolyable is in another region')
- reenter cave
- attempt to recall cache to vault (fails, 'depolyable is in another region')
