Oh, but I realized that the 21 sat zap worked from Coracle.
So then I tried another 21 sats on n*te15regq7al96tysdp9ufxn7f8xr2nj8hdxugqfgu42sv8k8raypwcqux0w80 and it failed again.
So then I tried another 21 from Coracle. It worked again.
It appears something is goofy when trying to zap you from Primal.
I'm signing off now, can't look into it more now...