Thank you for sending me your project. I opened it and followed the steps provided previously and did not notice a hang in RAM usage. I noticed that basically instantly, the GB went down by about 7 GB.
It’s possible that it could fall back on the fact that you have an AMD set up, I have an Intel set up. I also have double the RAM.
I checked on a local machine that is running an AMD card but it also has a similar set up to mine and I did not notice any delay in closing out the program and providing the resources back to the computer.
Are you running any programs in the background that would some how latch onto the UE4 program and cause the exit to hang for a bit? Are you running any programs that would make the resources spike, such as Visual ?
Thanks!