Sub folders of existing folders cannot be added as sample locations as before

I have around 300k samples and Rando does a much better job with indexing speed and noticing if the folder has changed in the beta. It made troubleshooting this easier. However I like to add certains subfolder as separate locations, due to the lack of a better way to search only sub folders of current locations. This used to work fine.
Now if I add them AFTER adding the parent folder the sample count shows as zero for that sub folder location and its not just the number, no samples load for that location.
I CAN RENAME the subfolder, then re-index the main folder it does work, but the main folder count is less the samples in the subfolder location, when it should also include them. So I guess the summary is nested sample location no long work?