[GAMEPLAY] Urgot Bug - R got canceled

I got this bug where urgot's ultimate got canceled for no reason. Usually it stays like this until urgot dies or even stay for the entire game. I'm not sure how it occurs, because it happens quite randomly, but it might occur because of: flash + R, OR buying mercurial scimitar, OR use R immediatelly right after urgot encounter enemy, OR using battlecast skin, OR getting stunned once. So here's how it happens in my recent game:

1. Try to ult Swain
2. Swain uses Nevermove
3. Urgot's R got canceled
4. I couln't use urgot's ultimate again to anyone for the entire game, his R just broke, it wouldn't swap
5. lose the game

It's been a while since I first encountered this bug, but it seems like it never got fixed. So please fix this champ as soon as you guys can, it's my favourite champ. If you guys don't care enough or aren't capable of fixing Urgot, please just simply remove the champ. Why having champions that you wouldn't bother to fix. As an Urgot player, i'm not asking for a buff or a change to the champion, I just simply want the hero to get fixed, so that i can play him without worrying whether his R would get bugged or not.

Thanks.

p.s. i'm playing on INA server, i already report this bug to INA server's support, no response from them, that's why i came here.