After 3.8.0, Plexamp on MacOS 10.11.6 does not see my server

Hi folks, I have the same issue. Plexamp 3.8.2 on Mac running El Cap 10.11.6 does not see the server. Other devices are working. @mortenso, did you figure out anything on the Mac-side? I can add one more clue here. When I launch plex-web in safari from my localserver:32400 then everything works, but if I point safari to plex.tv initially, it will log in centrally, but fails to connect to my server. This does not happen when I use Firefox.