Has anyone else experienced SW2019 forcing a rebuild upon creating a folder in teh model tree and then adding items to the folder?  

I've had this happen several times.

I just created a new folder and added about 300 items to it.  SW now appears to be rebuilding after each item it adds to the folder.  This is going to take several hours to finish...

Why would SW rebuild upon simply creating a folder in the model tree?

EDITED BY MODERATOR: Moved to the Parts and Features space. Please post to the appropriate space when one exists.