These release notes cover 6.21.0
Features & Improvements:
When Location and Staff were not included in the scheduler flow those fields were also not being filled in the waitlist.
Fixed a missing error message that indicates when there is an issue loading a custom booking site.
"Client Added to your Waitlist" template emails were failing to send because the ‘To Address’ was not being populated with staff emails.
Some users were getting an error message when trying to edit a recurring appointment series.