I don’t know if this is new to Dorico 5.1.3.
I have the habit of hitting frequently cmd+s while working on a computer project. If I’m doing this while editing a master page, it just deletes everything you’ve done so far…
You need to click outside the green box in order to get the right menu. Would be possible to make it work in all circumstances?
Adding on to this: A couple days ago I tried hitting Close when I had changed text in a frame but had not closed the text editor window, and my change was discarded.
It’s understandable if the text editor window must be closed first, but then the Apply and Close buttons should not be enabled while it is open.