If you are in the middle of opening a cubelet and get pulled into a game (such as the party leader), your cubelet disappears and you are unsure of what you received. My suggestion is to come up with a mechanism that prevents that. Here are two of my ideas:
Idea 1: If the cubelet is not fully opened yet and you join a game, the cubelet goes back into your cubelet vault.
Idea 2: You still get a message in chat even while in-game lobby telling you what you received.
Leave an if you want this to be added, or leave an if you don't want this to be added but please let me know why down below! :)