Start in Write Mode with Zoom at, say, 500, as shown in the box.
Change to Engrave Mode.
Zoom stays at 500, but the box shows 250 (which may have been the previous setting I used).
Back to Write Mode. Zoom stays at 500, but the value in the box still shows 250.
Yes. I close Dorico every night.
It seems that whatever new zoom level I set in one or the other mode is also used in the other mode, but the read-out stays the same (at present it is stuck on 225 and changes to that value when I change the mode back to where the zoom level was last changed to something else).
I opened Dorico.
Zoom readout reading 324%, Engrave mode, properties panel open.
Close properties panel with arrow. Zoom stays the same, but readout now 225%.
Change to Write mode, set zoom to 300% at the bottom right.
Change to Engrave mode. Zoom stays at 300%, but readout stays at 225%.
Close Dorico. Check no recognisable zombie entries in Task Manager.
Restart Dorico. Same behaviour as above.