I had the same problem until I download the version that comes with it's on Java runtime environment. The problem does not exist for me anymore but you'd like to try to same if it's still a thing.

Also try to disable any installed plugins if you have any. Some old markdown plugin were causing a stability problem on PhpStorm back then. You may have experiencing something similar.

One last suggestion: try to move/remove the folder that keeps your settings.

Not sure if any of these would help but may worth to try.