Z-Wave serial port opening error

hassio, core-2021.2.3, supervisor-2021.02.11, Raspberry PI4
I am struggling to get the Z-Wave with RazBerry2 Z-Wave HAT working properly in parallel with Bluetooth.
I have the following options in /boot/config.txt:

dtoverlay=miniuart-bt
force_turbo=1

and BT works. Z-Wave not so much (this from core zwave log:


15:44:35.024 DRIVER   serial port errored: Error Resource temporarily unavailable Cannot lock port
Unable to start driver [Error: Error Resource temporarily unavailable Cannot lock port]

Looking at /dev/ttyAMA0, it configures to audio group, which I assume is incorrect group:
crw-rw---- 1 root audio 204, 64 Feb 21 15:35 ttyAMA0

Can anyone confirm which group the device should be assigned to?

It is usually assigned to the dialout group.

Conf error, the device works with audio group too.