Hi,
I investigated the same Bluetooth A2DP audio routing issue on my Jolla Phone 2026: after reconnecting, the device shows as connected, but media audio still plays through the phone speaker.
I traced it to missing device UUIDs in the OHM BlueZ5 plugin and developed an experimental fix for Sailfish OS 5.2.0.20.
Details, testing results and RPM:
https://forum.sailfishos.org/t/community-testing-bluetooth-a2dp-reconnect-fix-jolla-phone-2026-sfos-5-2-0-20/35395