According to the data that I found, how the titan score is calculated, it should not make a difference - 0 is 0. It might be, that “null” has another impact than 0, but I doubt it.
(Titan score decreasing)
However, are those counted as hits and does it provide loot then? Sometimes I have 4* non-farmable ascension mats from escaped titans. Very seldom, but it happens. This would be a good reason for “flee-attacks”.