After I ended that session and started a new one, it started to count correctly, but after a few hours, it began to increase those numbers. Not just for the current session, but also for past ones. It was eventually adding 2k hands for all previous sessions per each played hand.
Let me know if you require any logs for testing.
I don't have any alias, just one player selected.
Oh, and clicking on another player didn't give me that bug; perhaps it starts after a certain number of hands, I'm not sure.