Help with Device Auto-Mount

I am trying to use the Device Auto-Mount feature in KDE Settings but it doesn't seem to be having any effect. I have selected On Login and On Attach for the drives I'm interested in, but after rebooting they aren't auto-mounted.

If I click on them in Dolphin I am prompted for my user password and then they get mounted.

Anyone know what might be going on or where I should look?

• I couldn't see any obvious errors in journalctl
• drives are not encrypted.
• running AuroraOS

and yes I know that I can set this up with fstab, but it would be good to understand why the GUI approach isn't working and hopefully fix it.

reported bug to kde https://bugs.kde.org/show_bug.cgi?id=490872