this is not game breaking and probably doesn't even need to get fixed anytime soon. Anyways even when your iventory is full you can click on equipment so that it will be attached to your cursor. Then click on your portrait to reset instance and *poof* back in town with equipment on cursor to drop, sell, bank etc...

But is it really a bug? When you get to town you still can't do anything with it other than shuffle it through your inventory or drop it.

I don't think is a bug but instead a nice feature. The game has to remember the last object your character touched and the status of your character. Wait until you click on a rainbow that you've been wanting to add to your collection and farmed hours for and lose Internet connection, you're going to pray that once you log back on that it's still there on your cursor.