We have a client that has seen a behavior change related to how gmail reads the user enrollment email + ical attachment sent from Totara for seminar sessions with multiple dates.
When Google conversation mode "email threading" is used, the meeting invite acceptance button no longer displays after the first message. The user is required to manually accept each calendar invite vs, simply clicking accept once in the email thread. They think it's a Google thing rather than a Totara thing but are curious as to whether anybody else has experienced this lately. None of our clients have.