Strange RAM notification

I received this notification regarding available RAM. Never happened before. Not sure what triggered it. The game also has had recent issues where it refused to quit, requiring force quits.

Your other processes are taking up too much memory. As the picture shows, only 1G memory is left

That’s the thing - I don’t think other processes was using up the RAM. I sometimes have instances where AgeIV is running twice and causes problems.

Have the same since today.

Only using 4GB, “Users” in Task manager shows it correctly, still 80% of my ram (16Gigs) is taken way after AoE4 got closed.

Possible memory leak?
Windows update buffer in the background?