I tried googling this problem, but couldn't find any clear results, so maybe someone here knows about it.
I am using Pop OS and Heroic Game Launcher to play GoG games, as well as some RPG maker games, because it just works. Recently I started playing Trepang 2, everything works fine, only that when I close the game and Heroic Game launcher, the CPU is stuck at 80% usage, even though all applications put together use less than 5%. It's just that the CPU is stuck at 80% for no reason. I should also mention that, after I close the game, and then try to close Heroic Game Launcher I get a popup saying "There are pending operations, are you sure?". I assume there is some zombie process from the game, that the launcher is unable to close. Does anyone have any ideas how to solve it?