I’ve the same problem Skopin.
As a user of tinyMediaManager to generate .nfo in the same folder of the movies / series that I then import from Plex using the plugin XBMCnfoMoviesImporter.bundle I have detected the same bug you reported: both the collections (set) and the tags (tags) are imported into the same field of Plex collections.
I think the solution would be simple if line 687 of the XBMCnfoMoviesImporter.bundle / Contents / Code / __ init__.py file was modified in the sense of adding the information from the nfo tags field to the PLEX tags field; metadata.tags.add
It would probably also be necessary to add the equivalent to lines 890-893 of said file to contemplate the previous modification.
I hope anyone can evaluate this because I’m not a programmer and I’m not sure that solution proposed is feasible.
