Sometimes my kinich nightsoul bar "lags"!! + is my rotation correct?

Hello, i know the title seems confusing when i say the nightsoul bar lags but i will fully explain what i mean by that..

First here's the video

https://reddit.com/link/1tb4035/video/qs01t9b2zp0h1/player

Watch closely at 0:56. literally when timer starts, you can see that my nightsoul bar doesnt "jump" to full bar like other shots for a few millieseconds, it might seem harmless but sometimes this can cost me 5th shot as you saw what happened i wasnt able to land the fifth. happens to me alot in stygian against papilla which well obviously cost me aswell

the very last rotation was messed up i know but i'd like to see your thoughts. i was able to learn the trick of quicken with solo dendro thing thanks to u/Mascherata9406