Possibly a Cabbage Posted:

Gamblebot doesn’t play fair. It accomplishes highly improbable things with great regularity while you bust hitting on a 12 virtually all of the time.

I haven’t experienced this. While I occasionally get bit on a 12, it’s no more frequent that IRL. Most people that complain about this sort of thing are responding via emotion rather than actual data. If you get frustrated on a bad run, then you remember those 5 in a row bit 12s more vividly than you remember the 6 times that you got a 7-9 on your 12, because those happened sporadically over the course of your session.

Run some raw data, and then see if it’s still ‘virtually all the time’.