I’ve been tracking this for a few of my battles for the past few weeks and here is what I’ve finally figure out as fact. This has happened several times now.
Upon a killing blow that ends a PVP battle, if you send an emote, it plays and the game immediatelt crashes. A popup shows up saying “An error occured” you click it the game force restarts. You earn the chest/win but you do not earn the points toward the current brawl chest.
I’m not going to message support with this, so please don’t ask. Please report it to them and have them fix it. They don’t need my support ID, I dont want the chest points, I don’t care.