Thank you for reporting this information. I was able to replicate what you have seen with deleting folders and having them reappear. I have place report UE-11796 into our bug database so that the issue may be resolved in a future release.
At this time, I cam uncertain as to when this issue will be resolved but I will be sure to keep you updated as I see any change in the report.
I was able to delete an empty folder following these steps:
Open a blank project with Starter Content
In the Content Browser, move all content of the Architectural folder to another folder in the Content Browser
Delete the Architectural folder
Architectural Folder is gone from the Content Browser and Windows explorer as expected.
Please try these steps and let me know if you do not get the same results. Also, please post the steps you are following so that the folder does not delete. Remember to save all in your project after deleting.
4.21.1, u guys could fix this? theres so much glitch with the content browser reference loosing while moving… folder keep holding file while deleting those. then you loose reference of some asset because you move this… thats terrible.