In the Android Handy App is a switch in “Settings” to support IPv6. If your PMS network settings are IPv6 only, you can setup a IPv6 in PMS remote settings.
Plex Samsung TV app seams not to support IPv6 yet.
Ah okay I see it now. It’s a bit weird it doesn’t show both ipv4 and ipv6 together on that page but maybe because beta? Is the ipv6 still active even when i switch it back to ipv4+ipv6?