Out-of-the-box part layout anomalies

[asherber]

It’s true that Dorico sometimes does make decisions that lead to a cramped page.

„Resolve the collision..” strange behavior

The problem here is that Dorico does not know exactly how much vertical space the music is going to occupy until it has cast it off, but it cannot know exactly how to cast it off until it knows the height of the music, so this is an inherently circular problem. When the 'Automatically resolve collisions between adjacent staves and systems’ option is on, then Dorico makes an estimate of what it thinks the height of the system(s) is likely to be prior to casting it off, so that it can decide when…

In your case, it looks like there are several lines with notes going way above and below the staff, as well as collisions between tempo marks/rehearsal marks, etc. I would guess that these are complicating Dorico’s spacing algorithm.

My usual approach in cases like this is to start by putting a frame break on the bottom system of the left page. This gives Dorico more vertical space to work with on that page, which is often enough to space systems properly.

After that, there are individual tricks you can try, like moving tempo marks to slightly different rhythmic positions in Write mode, to avoid the collision, and then repositioning them in Engrave mode. (Dorico does not recalculate automatic spacing after you manually move an item.)