Update:
Building and installing iwd-2.12 from debian/sid fixed the problem for me (some Ubuntu fixes need to be applied to the debian package).
It seems that this could be a compatibility problem with the newer kernel and the older iwd.
Update:
Building and installing iwd-2.12 from debian/sid fixed the problem for me (some Ubuntu fixes need to be applied to the debian package).
It seems that this could be a compatibility problem with the newer kernel and the older iwd.