Squarespace change history: Acuity Scheduling / Undelivered SMS reminders

Acuity Scheduling SMS reminders were not delivered for some customers in a major-impact incident from 2025-09-09 18:19 UTC to 2025-09-09 19:26 UTC, lasting 1 h 6 min. Squarespace identified the issue, reported implementing a fix, and marked the incident resolved; affected customers could miss appointment reminders.