Pretty minor issue all things considered, but I've noticed that the anchor frame for the Main frame seems to not have the same functionality as the spotlight frame, meaning it doesn't fade in with a tooltip (and can't be moved even with Lock Cell Frames unticked), resulting in just a dead, invisible rectangular shape wherever the anchor is when not in Preview mode.

Depending on where you prefer to place your raid frames, I can imagine this resulting in some frustration in certain situations (like in Open World when hiding the raid frames).

This might just be a bug?

Fixed, thanks for the feedback.