I’am found topic with similar problem Particle System attached to bone not updating fast enough (trying to make wingtip contrails)
It seems that this task is unsolvable, I can’t use Ribbon trail cause he is 2D plane (it’s looks awkward when viewing at other sides) and the form of the trail would be wrong.
Spawn per Unit has nothing change - the same issue as result.
Interesting how Raven Softwear and DICE made this FX , maybe they hardcode this some how.