MS Bookings doesn't save after editing a Service

I too had been having this problem. I have multi-person appointments setup for a couple months ahead.

I made some updates to the automatic notification one receives when booking a service. I edited, saved, and everything looked fine. Then I tested it and the email notification was sending the old message. I went back, checked the notifications under the services, and all had the new message. Why wasn't the new message being sent?!

I figured out that the old message was being sent for existing appointments! I added a new appointment and then tested it and the new message was sent! So, if you are having a similar problem of editing, saving, and the new info not taking effect, it may be because it is not updating any existing appointments, but it will update any new appointments.