I am also having this issue in 5.5.4
It’s only happening with one project and is fine with all others. It seems to be a problem with the project itself. I have tried cloning it and also opening it on another machine and the problem persists.
This is driving me crazy. I have work I need to do and there is no work around I can use because I am creating a course on UE5 and I am creating a chapter on using the FAB plugin!
Please help