Not sure if this is a “known issue”, but I have raised it with Glide a couple times now. One of the issues I’ve noticed is that the action fails when the destination column is blank (marked in Red)
The ones marked in Orange should work as an Action…not sure why they’re not working as a column. Try as an action to test.
The ones marked in Black are unknown. I’ve never attempted to add sets to sets.
So, why aren’t the orange cases working in a column? They used to back in early summer. The app I used it in before and it worked, I see the column is no longer functioning correctly.