How do I leave a group on Intervals.icu?
Click on the group,
Then top right are three dots
Click on that and select leave group.
edit: added image
I don’t have that option, it seems the group owner already deleted the group.
But now I can’t leave and/or remove this group 
Which group are you trying to leave?
It is or was called The Brews
If you reload the app “Leave Group” should be back on the dot dot dot menu.
That worked, thanks. No more annoying ghost notifications 