Sometimes I’ll select an item in my inventory and it’ll be something different. In these examples I’m getting the golf ball milestone (which is especially bad since you’re still not always able to exit it when you’re in the plaza, so you have to disconnect to get out of it), but it does happen with other items. Makes it pretty annoying when you’re trying to show off items to friends or pull out your metal detector for the treasure event.
Removing and adding the item back to the hotbar does fix the issue, but it sometimes takes a few tries.