Plasma Theme Explorer not showing themes

I noticed since upgrading to Plasma 6, the Plasma Theme Explorer doesn’t show themes with the new metadata.json (and metadata.desktop removed). I went back through and put a metadata.desktop (old) file along with the metadata.json (new) and the themes now are displayed within the Plasma Theme Explorer. I wasn’t sure if this was a bug, so I wanted to post here first.

I can provide more details if necessary, it seems self explanatory though. Unless I am the only one being affected.