Player randomly disappears in Seasons

I've had it about 4 times in the last day where I suddenly go down to 10 players for no reason. No red cards or anything, but my striker just vanishes from the game. Anyone else experiencing similar? The first time it happened I thought I was playing someone who hacked the game to force the issue to happen but 3 times since makes it feel like it's a bug in the game, unless the game has been flooded by hackers.