Zealot ult not faster - If you quickly click F to ult

Issue Description:
if you quickly click F to Ult as zealot it’s not faster as when ulting while holding F locking to an enemy.

Steps to Reproduce:
If you ult as Zealot just clicking quickly F it will charge slowly. Unlike when you ult locking to an enemy and holding F you will travel more distance, which seems to be normal behaviour, unlike when you quickly click F and doesn’t travel at the same distance…

There’s clearly a level of difference of speed.
Why it charges slower if I don’t lock to an enemy?

Platform:
Steam

Reproduction Rate:
100%

Upload Supporting Evidence:
no need