Bluetooth disappeared

I have no Bluetooth connectivity between my “Zenfone 9” running Android 13 and my ND5 XS 2. The Zenfone cannot “see” it.

I’ve got both the “Input enabled” and “Open pairing” ticked in the app settings.

I’ve made sure the “Bluetooth” Input is highlighted in the app.

I’ve done a full power off-on. I’ve done a pinhole reset.

There’s nothing wrong with the “Zenfone9”, it connects immediately to my headphones and JBL Bluetooth speaker.

What am I missing?

Did you have Bluetooth working before with the ND5XS2. Have you got the Bluetooth antenna mounted on the ND5XS2 ?