Whenever me and my girlfriend play together on Switch, we do a local connection on our Wi-Fi.

When I play, I am immune to bomb damage. No idea why. But I can just blow them up like crazy and they do no damage to me whatsoever. Any form of bomb does no damage.

However, whenever I'm in the mines or anywhere else that a prismatic shard drops, it doesn't appear for me, it pops up randomly on her screen somewhere, typically on the farm where she is, or anywhere else. She could be on the beach and suddenly a prismatic shard will materialize out of nowhere when I'm at like level 100 of the skull mines dropping bombs. It's as if the prismatic shard that would have dropped for me instead just appears on her screen somewhere.

Are these known glitches?