In my workflow, I came across this quite a lot, when I work on the layout of a piece:
I adjust something in Note Spacing, Staff Spacing or adjust the Frames (one of the three toggles is switched on) and find something, I have to change in Write Mode. I go back to write Mode, make the edits and perhaps select something (notes, dynamics …) and switch back to Engrave Mode, to adjust the position. Unfortunately Dorcio goes back to the last Mode I was in and I loose my selection. It would be a time saver, if Dorico would respect the selection and change to “normal” Engrave Mode in this case.