In-Game Timer not accurate
When hovering over a friend, their "In Game (Game mode) - [Champion] [Time in game]" timer is not working correctly, continually saying friends are in 60+ minute games. Timer appears to be either bugged or carrying time over into additional games started shortly after previous ones. Timer may show insanely lengthy games in progress (80+ minutes), whilst match history afterwards shows normal game times (30+ minutes).
Edit: This is much worse for some people. My friend's timer does not reset at all, and she continually sees people in games multiple hundreds of minutes long.