Change wording on Phantom Touch on FAQ.
I didn't get an answer on FAQ: Awakening, so I had to test it out for myself.
The wording states that there is a chance to proc Bonus Damage with EVERY hit of a multi-hit skill. It also states that bonus damage counts towards FK shield.
So I saved up and bought 5* awakening for ColdHeart. At 5*, PT has a 100% chance to proc. 100% "chance to proc Bonus Damage on EVERY hit of a multi-hit skill" means a 4-hitter will result in 4 instances of bonus damage. That does not seem to be the case. It seems that the Bonus Damage gets triggered once per skill, at least testing on the FK shield (it registers 5 hits).
I think there needs to be a clarification or fix if it's not working as intended.