For better or worse, Dorico ends up treating those tie situations as chords rather than single notes, which is the intended behaviour, but I can understand that in this kind of situation when the notes are a long way apart it might not always be what you would prefer.
If Dorico is recognizing these situations as chords, why doesn’t the Tie’s left endpoint also move? Dorico’s behavior for ties in my GIF does not follow “All between noteheads”, and only the right endpoint is moving horizontally to the left.
Like this picture below, Dorico seems to recognize the second note of tied notes as a chord. Just like in the GIF I posted, all the right endpoints are moving horizontally to the left.