Aggregate device problem on AirPods/beats/Bluetooth devices with Cubase/Ableton.

I use AirPods on Ableton Live.

I can select sampling rate only 44.1kHz when I select the device to "AirPods" on Ableton.

But I need '48kHz'.

I create 'aggregate device' on Audio MIDI Setup.

It was working on previous macOS high sierra.

I choose Clock Source to MacBook Pro Microphone, so I can choose 48kHz.

But now is not working.

If I select 'aggregate device', the I/O value is decrease 2 to 1 out.

This also happens with other Bluetooth devices such as beats.

What should I do?