Steps to reproduce:

Install DXP with postgreesql

Go to Content Structure >Media> Files > form uploads and add form upload to bookmark

Go to Browse > Bookmark, click on Preview icon on Files folder: edit and publish it without modifying anything

Go to Browse > Bookmark, click on Preview icon on Media folder: edit and publish it without modifying anything

Go to Browse > Bookmark, locate form uploads and notice the structure is now:

Media > Form Uplaod > Files

Expected behavior:

The form upload bookmark structure should be: Media > Files > form upload