OK, some of that could be the case… I have a file with 3 layouts. Full score (which is Dorico’s default), I have the Part layout (never touched this one, as it is Dorico’s default), and one called book layout (I created for setting up the independent music frames, graphic frames, and text frames.
I create all the music in Full Score layout, then in Book Layout I lay it out. What I have noticed when I add new flows, when working on the Full Score layout, that is where the problem seems to occur. Once again, not consistently, so I am not 100% sure. I am also 100% of the time entering music in page view. And yes, pressing ‘return’ does work very reliably.
I have also noticed that around the time the problem begins to exist, another type of issue occurs. I click outside of the measure, which if I recall correctly, used to take one OUT of note input. If I double click the staff, I enter note input mode, then if I click elsewhere, the orange caret is still visible. And I am NOT taken out of input mode. I have to hit the escape key. Not sure if this is a ‘new’ feature, or new ‘behavior’, but I don’t recall it doing this before, and I believe I see the double clicking issue occur around the time I start to notice this.
I can send you the file if you’d like to take a look at it, but it sounds like you are already aware of some this issue.