This was a big issue a few months ago and apparently it still exists. 2 people in a FoTM 50 party today (myself included) did not receive the bonus chest. This has happened off and on in the past for me and of course Anet can do nothing to reimburse you so, perhaps taking another look at the problem would be useful. There’s no reason to do FoTM 50’s except for the loot…so remind me why would we do them if there’s a bug not fixed that we would event get a chance to get screwed over on RNG on the bonus chest lol.