Changes saving then reverting back – anyone else have this problem?

I’ve been having this problem where I make changes in my PP admin and they stick.

But then later on (could be a few minutes, could be an hour) those changes vanish and things revert back to what they were before the changes. So I have to go back in and make the changes again.

They could be anything from Custom CSS entries to Custom display entries to search setup to just turning things off/on…..you name it. They are all changes made through the PP admin control panel and never WP admin or file changes.

What could be causing this?