Need help with simulating

I managed to simulate to around 1600 simulations but I won’t get the xp and the gems. The last simulate achievement was 814 simulations.

I did something like that, and I got the simulation points 2 months later.

Looks like you’re not the only one:

I’ve had the same issue. I have simulated 36,000 games, but the achievement still shows 8,290 games simulated. I have tried clicking the volume button about forty times. I’m running Firefox 55.0.3 (32-bit) on Windows 7 (64-bit). I would like the gems to buy new items. Can someone help me, please? Thanks!