SION ULT RANDOMLY STOPS AFTER CAST BUG [GAMEPLAY]

Hi,

I'd like to talk about a bug that has happened to me multiple times while playing Sion. The bug is really straight forward about whats happening but i found it really hard to find out what makes it happen, and still am not 100% sure what causes the bug to occur. The bug is as followed ( from personal experience ); you flash and immediately after use your ultimate and you instantly stop in place stunned and going on cooldown as if you hit a wall. This doesn't cause the ult to cancel 100% of the time, but this is the best cause i could find as i tried it in the practice tool. I tried looking up the bug and havent seen anyone post / encounter it yet so i thought i'd get the job done.

That's all i got to say thanks in advance! [slayer-pantheon-thumbs]

( I have replays of it happening but im not sure how to post them on here if anyone could help me out)