Docker update - No soundcards

Hassio supervisor updated to 06.2, and broke. This is because it required me to update docker to 20.10.7 but then this update broke Rhasspy.

If I enter the rhasspy docker container:
sudo docker exec -t -i addon_47701997_rhasspy /bin/bash
and run arecord -l, I should expect to see the sound card, right?

Inside the container, I get:
arecord: device_list:272: no soundcards found...

and on the host I get:

**** List of CAPTURE Hardware Devices ****
card 1: CMTECK [CMTECK], device 0: USB Audio [USB Audio]
  Subdevices: 0/1
  Subdevice #0: subdevice #0

Is there a permissions issue with /dev/snd? Does Rhasspy Hassio Addon require a change to be compatible with the latest docker?

I’ve reinstalled, but no luck.