While looking into !752 (merged) I realized the update_mixer_paths() function should be using the UCM verb name, not the profile name (the two can be different with conflicting devices). I had tried to fix all that confusion in commit 45278904 ("alsa-ucm: Stop conflating profile name with UCM verb name") but apparently misunderstood this one. Also looked around for more like that.
(This MR doesn't include the change in !752 (merged) to avoid a merge conflict, but it should also be merged if this is merged.)