It appears there’s an issue with third-party Bluetooth headphones, or at least with my B&O Portals.
They connect, and I can flip between the various ANC modes, Bluetooth and WiFi as normal, both using the controls on the headphones and via the B&O app.
However when I try to listen to anything all audio is routed through my phone(3) speakers regardless of the app used.
My Nothing ear (2024) work just fine, and these B&O Portals worked perfectly before the update.
(Feedback / bug also reported via the phone)