Look at this example:
First system:
Bar 1 and 2: Dorico does not add extra space for the flag in bar two before the barline
Bar 3: Dorico adds space for the tie at the end of the bar
Bar 4: Dorico adds space for the tie and the flag at the end of the bar. For me this looks to much.
Second system:
In general it would be great, if Dorico would be able to adjust the ties for the upper voice automatically.
Bar 1 and 2: Dorico is not adding extra space for the flag.
Bar 3: Dorico is adding space for the tie
Bar 4: Dorcio is adding space for the tie and the flag, even if the note with the flag is moved to the left. This looks wrong to me.