Whenever you use Vexing bolt on Sinclair there’s like this 0.25 second period in which the screen goes black and white and there’s a green flash in the center of it.
The bigger issue is with ultimate, many times when you try to steal the ultimate especially on instant cast it just doesn’t work. The sfx of the ult being stolen is heard and the stealing vfx is seen but then nothing gets stolen, this is incredibly problematic in heated fights in which you can’t look if you managed to correctly steal the ult and then notice it wasn’t stolen despite the sfx making you think so. This is something that could happen before with Sinclair but now it feels like it happens a third of the time.