VLC for mobile (iOS) does not discover UPnP servers

The TestFlight build, recently 3.3.0 (396), does not discover UPnP servers within the local network. The App Store version, recently 3.2.13 (375), seems to work. Attached two screenshots, one showing the TestFlight (dev) one, the other the App Store (stable) one. Samba shares seem to be recognized.