Google Home devs apparently don't know how to fix the UI to delete a Speaker Group. Previously, had to install v1.19.26 to delete a group. Then when you upgrade to the latest version, you CAN delete the groups... but if you delete ALL of the speaker groups and add a new speaker group, the "Groups" section never re-appears, so you have to do this entire process all over again: -uninstall latest Google home app -install 1.19.26 -upgrade to latest -remove groups (but not ALL GROUPS) FIX THIS ISSUE