Bluetooth - Paired but can't connect

[daveozzz]

I think it’s time to move this issue to somewhere in the Raspberry Pi Forum. Whatever is happening is taking place in the hardware/firmware/OS layers and should be solved there.

Yes I've got that.

I suspect there may be little traction on diagnosing a problem which appears to be fixed a later version of pi-bluetooth though.
Some unlucky interaction between the pi-bluetooth version 0.1.15 that ships with Moode audio and certain models of Pi4.