I installed a BTT smart filament sensor V1 (SFS) and when I start a print during the prime blob it goes from "active" to "empty" in mainsail and pauses the print immediately.
Then to be sure, I snipped the filament before it went in and it didn't detect the runout.
I put the macro in the user overides config but I might have missed something somewhere. Appreciate any help. Config included.