I, my account "stlupi" i have 4 workers,, 2 gold ores and 2 chambers so i must have 120 gold every 15 minutes but often freezes and I get less gold !!!

I have marked the last 20 calls and I noticed that repeats the same sequence, 2 s always exact, 120 gold, and 2 wrong with a lower amount, sometimes only 8 gold instead of 120, only in these 20 calls I received 600 gold in less than it should.
Please solve the problem, thanks.