AP Buff Succession Hashashin does not work

Bug Name:

AP Buff Succession Hashashin does not work​

Bug Description:

When using the class ap buff (Shift+F or S+RMB) which gives 20 ap, you don't notice any difference in damage. I swapped to a kutum which has around 16 ap more than my evasion off hand and I immediately notice a damage difference. I tested with bufffood as well which gives around 20 ap, which works, but just the buff doesn't do anything. By the way, E buff (Accuracy and resistance) makes S+F (9% ACC Buff) unavailable as well.​

How to reproduce/proof:

Just use Shift+F or S+RMB(on a target) on hashashin and check if damage is more or the same.
https://streamable.com/3c5d4d​

 

Well obviously kutum will do more dmg if it's pve. Don't forget you just slap 20 ap on top of least 500 from sheet ap and hidden ap so the dmg increase is minimal.

 

The kutum was just for an example. Also, since when is a player PvE? Did I attack monsters? No. I didnt do any more damage at all with buff, and I didnt swap gear as shown in video when testing. There was literally no difference, and I tried way more than in that video just to make sure.
I've been playing hashashin for 3 months now and I never noticed any difference with the ap buff, so I experimented.
Also, let's not forget that his accuracy buff doesnt stack with his E buff accuracy, because the E buff just delets it. He has a lot of bugs right now, the AP buff is just one of em.

 

can confirm, same is happening for guardian +20% attack speed buff.
the tooltip shows attack speed increase but actual attack speed stays the same.