Seems to be a random problem, on my system on some occasions this occurs once and after that it doesn't recur, while other times it never happens. I can't really pinpoint the exact cause, but my guess is that it may have something to do with Easy Anti Cheat (a service provided by Epic) which continuously checks background running processes to make sure people are not using cheats or hacks.
Not saying that you are using cheats or hacks, but like having an antivirus software running constantly in the background, it is bound to cause problems at some stage. Or it could just be a bug that they haven't fixed yet.