If you have steam open yea
Sort the application in the bottom half of that window by memory and share the screenshot. What else is open?
here is images of sys monitor and htop let me know if you find anything unusual https://ibb.co/RQfKNZK https://ibb.co/sRWbT94
Could you sort the SYS monitor by “Memory” please? You have it currently sorted by “Downloaded”.
As for htop, could you hide threads? Hitting “h” should do it, IIRC.
I saw this the other day on my computer, then I checked and most of it was system monitor, so I think it was just a memory leak or something
No
It is if the memory is held by the kernel for caching or buffering. Is it using an in memory swap file? If that’s even possible, I’m not sure.