I’m using Tailscale vpn in the iPhone. Music playback from albums tracks are ok. Only download and playlist not working. I tried reinstalling results are the same.
FWIW, I’ve been on iOS27 since the first beta. During any use of Roon/Arc I’ve not seen this. A combination of both port forwarding and VPN. Additionally this was Roon installed on DietPi with either Tailscale or PiVPN.
Might be worth @MusicFidelity uninstalling Arc and I’m aware it’s a PIA as you may lose any downloads, but as you don’t have Downloads, it’s all I can suggest.