Importing files by dragging and dropping folders doesn't work anymore.
Premiere is bugged and no longer adheres to the folder structure you create when dragging and dropping multiple folders into your project, and instead creates a jumbled mess of all the files from the various folders. This needs to be fixed ASAP.
Kevin Monahan commented
We have an editor on the community having the same issue: https://community.adobe.com/t5/premiere-pro-discussions/inconsistent-folder-structure-import/m-p/13108460
I have also upvoted as I could reproduce similar behavior.