Hello!
I not sure if someone already noticed it or created separate post about it -- after the update (J4.4.0 + Gridbox 2.16.2) I've noticed, when editing a page in Gridbox editor:
The left panel (i.e. Page Structure) that I can opt to "glue" to the left ("Panel to left" option) - now will overlay the edited page if I'm in the desktop viewport - before, it was resizing the center (= page) so that if I have panels locked on the left and right, I will have a 3-column "working space" in the browser. Now, if I want to have the unobscured view, I need to resize the browser ridiculously wide (see screenshots) -- hope this helps!
Best, AZ