Plex navigation : duplicate entries (bug)

Hello. Found a bug in the plex support.
In plex a got a movie library A, with movies from folders 1 & 2 & 3
I got a library B, with movies from folder 2 only.

Plex never showed me duplicates entries, but infuse does while browsing the Plex nevigation.
It does not happened in the Infuse library view

Could it be possible to fix ?
Many thx