24.04.1 has been released as stable today. If you have any issues with it, please report them on a new ticket.
.1 contains a few different bugfixes for image occlusion, and that’s what that line is talking about. The transparent masks are a new feature, not a bugfix.
A .2 beta is likely to follow in the next day or or so, and the transparent masks feature will be in it.
Thanks, fixed.