Since this is a third party app I would:
A) Ask in the main Echo Speaks thread
B) PM the developer.
Or
C) At least @ mention them here to get their attention for your issue.
Oh so this is a question more about the SMS functionality of Hubitat then.
Sorry.
Yeah then I'd make especially sure something else wasn't texting somebody or somehow unexpectedly and then submit a ticket.
I try to avoid SMS like the plague.
IFTTT to Telegram for me.