Try removing the Razer software completely from the PC- not just updating it. The game was literally unplayable for me with the software installed for a long while. No, you won’t be able to adjust your keyboard colors; unfortunate, but at least the game is playable.
Otherwise, if you are using Reduced Buffering, you may be suffering from that bug (since you say it happens after you alt tab), where you need to set it off then on again after tabbing in and out.
However, the game doesn’t like being alt tabbed no matter what, so the optimal option is to never alt tab- that’s of course sometimes unreasonable.
btw- 44c on idle (if you alt tab and put the game into the background, the game goes into an idle state where it limits itself and its usage, so you literally need to keep the hwm window open separately, in windowed modes if you have to to see REAL temps during gameplay when things actually heat up) is actually kind of hot. Note that opening hwm at all adds +20c to the max values (So you need to reset the min/max from the views option before letting it monitor), so it’s probably not an accurate estimate of temps during a, for instance, team fight, where even alt-tabbing during the fight will RAPIDLY cool your cpu down as it goes into a lower power state.
Make sure you dust out your PC, that makes FPS averages drop dramatically as well, even when all should be fine since temps hurt even more.