So today there was a huge Chest glitch, that caused chests to spawn over 10x more coins.
The glitch has now been fixed.
Before being fixed, this bug exploited by a lot of players, most notably @Acol
Anyways I have reverted some of the top games that have been using these exploited coins.
So if you have lost some XP this is why.
Sorry about this situation, and I will prevent this from happening.
Thanks.