The three beamed eighth notes at the end of each measure are uneven. All layout options are set to defaults except that casting off is fixed at two bars per system (unchecking that option fixes it, at the cost of a generally unsuitable layout). Thank you.
John, what happens, if you switch off fixed casting and insert the System Breaks manually? Also I would check the Voice column indexes on beat 7.
The reason for the uneven spacing is because the dotted quarter chord and eight note are being forced rightwards by the down-stem dotted quarter otherwise colliding with the tied downstem note held from the start of the bar.
You can either try swapping the voice order such that the two upper voices are in voice column 0 and the bottom voice is in voice column 1, or if you want to maintain this voice ordering, you’ll need to manually adjust the note spacing of the penultimate eighth note in the bar.
Voice column index is discussed here:
Adjusting note spacing at individual positions is discussed here:
Also I find that if you shorten the stem of the down-stem dyad on beat 3, Dorico will allow the notes to align without having to set the voice column manually. (This is a good solution for bars 3, 5 & 7, but the interval in bar 9 is too small.)