Hue Emulator not detected by Logitech Pop

I had this working on home HA supervisor docker install, then I got a new Pi 4 and connected to ethernet directly, rather than Wifi. the new Pi is running Hassio and now my Logitech Pop Bridge won’t see my hue emulator. I’m guessing this has to do with the way the bridge scans, but does anyone know of a workaround?