Sometimes they will reimburse you, sometimes they don't...
best options- always make sure you have at least 25x the buy in for the coin room you play, unless you are so confident you can take bigger risk without feeling frustrated by such losses.
I can tell you, it get's more frustrating when such things happen in Bellagio where you wager 2.5 Million... but you can't always rely on WGT to reimburse you, so try to play wisely enough to manage your bankroll so that it doesn't bother you as much.