Odd, I’ll assume its the same phone number and entered correctly in both places? I’m seeing Schedule and Trigger SMS work OK in a quick test.
Just a thought, but is the event older than the new scheduler we just put into place? Those notes say June 12, but really it’s been in place since the 7th or 8th. We should have ported the events into the new system, but it’s possible there could have been an issue there. If it’s older than the 7th or so, might be a good test to delete and re-enter it. If that still doesn’t get the SMS coming as expected, let me know a little more detail about the events (what they are doing, settings, recurrence) and I’ll investigate.