Incorrect game loop updating when a tab is not active

[matenestor]

The game does not keep the progress correctly when its tab is not active. E.g. I have "10 minutes remaining until Infinite Replicanti". I go to another opened tabs doing my stuff, then I come back after 10 minutes and it says "8 minutes remaining until Infinite Replicanti". When I keep the tab visible on a second screen, then the time countdown flows properly.

I had a suspicion this is happening already before with gaining Infinity Points. I was getting bigger chunks when I closed the tab and then opened it later.