Illaoi can cancel Tentacles' attacks and have different attack speeds based on the order of attacks

You guys need to write somewhere about the Tentacle's attack speed. Anyway i got these numbers. 1 sec for the normal attack. 0.5 sec for the ult attack. Now...

Illaoi can cancel a tentacles' attack by ulting + w-ing when that tentacle is doing their attack animation. Doing this will interupt their attack animation and start with the next one, the dmg of the first will be dealt anyway. ( i made the video without sound because i didn't want it to lag). It's the only occasion i know in which a tentacle's animation gets cancelled.

Because of this i've also tested some other interactions. The results are these:

Normal to Normal= 2 sec https://www.youtube.com/watch?v=azvlM73Kpms This one seems ok. A tentacle's normal attack speed is of 1 second. So having 2 attacks in 2 seconds is ok.

Ult to Ult= about 1.5 sec https://www.youtube.com/watch?v=hEAtvlwmB5A This one is not ok. A tentacle's attack with ult should be around 0.5 seconds. 2 attacks = 1 second. What happens in this case is that the first attack is ok, 0.5 sec, but the second is actually taking longer, 1 sec, no longer getting the bonus from the ult.

Normal to Ult= about 1.4 sec (it's the animation cancel) I don't think it's ok. It's got more speed than the Ult + Ult, so one of them must be wrong. (This one's also got some weird Visual Bug on the tentacle when doing it)

Ult to Normal=2.1 sec https://www.youtube.com/watch?v=D9m93iHZ6GQ This last one is different. If you W after the Ult finishes, during the tentacle's animation, it will not cancel its animation but instead it will delay its next Normal attack, for some strange reason.

Bonus: https://www.youtube.com/watch?v=mTm1KofGjGo If Illaoi attacks a target with W while the Tentacle is spawning, that Tentacle won't imediatelly attack the nearest spirit / vessel when it finishes spawning. Instead it will delay its attack based on the Tentacle's attack speed. (1 sec for normal, 0.5 for Ult). It probably has something to do with the weird SFX that comes from the spawning tentacle the moment you W a target.