Smartthings with Sonos: volume is too loud. Resume original level?

When you trigger a sound, for example dogs barking, I have the volume set at 80%. From what I remember, it stays at 80% so when you play sonos again, its blaring loud at that same level. No way to have it go back to the original volume before the trigger?

It says to temporarily change it but it doesn’t work. It appears to keep it at that level. Any idea how to change this?

It’s only lowering by 2 for me…

Same problem
Appreciate if anybody has any recommendations or solutions
I have the smart home monitor “temporarily” change the volume to play something on Sonos but volume stays at level set by smart home monitor