After the last update, other windows work fine for joining parties (we can still move the character and do interactions), but the Proving grounds window now blocks all movements/interactions with the character and is very annoying and time wasting, please make it the same as the other windows so the character can still move and do interactions (and not freeze as it is now the case after the update).
In the case that matchmaking fails, it even blocks all movements for 5 seconds.