I can browse freely and not have it affect Idle Master; I simply get logged out every time I start my computer.

I don't use mobile authenticator (no mobile phone), but I do believe it's tied into its implementation.

I'm in a similar situation; though I'm not constantly being logged out, it's not remembering my information, so I have to relog every time. Seems like it started the past few days.

Further on this, this appears to be a bug when you only have one game to idle, and have it set to "Idle games with more than 2 hours individually, then simultaneously"; once I had multiple games to idle, it was working fine again.

It seems to be a problem when idling multiple games at once, or using that function, at least, even if you only have game to idle. I switched to idling one game at once, and it immediately resolved.

So, I idled a game for about an hour in IdleMaster, but both in IdleMaster and on my profile page, the game is being listed as having been played 0 hours.

As it exists, Idle Master prioritizes idling games that have less than 2 hours idled even when there are games in your collection that have been idled 2 hours or more and still have cards remaining. It'd be nice if there was an option where Idle Master would prioritize games that have already reached the 2 hour idle baseline first, then idle the games with fewer than 2 hours on them.