[GAMEPLAY] Weird bug causing my champion to "Freeze"

I'm not really sure how I can explain this, but randomly when I'm in a game I'll just have these brief pauses where I'll be on consistent 30 ms and good frames but my champion will just stop doing whatever it is doing it won't listen to any input to move on the mouse or use an ability. However I can type fine and everything else in the game is fine but I just can't move and I'm stuck there helpless. I don't know if this is a personal issue with me or if it's something with the server but it's really frustrating to play and randomly lose a fight or even the game because I couldn't move or use any abilities.

I'm not sure how to reproduce this, I've sent a complaint to riot prior because I thought this was a bug with a skin I was using but I never got a response back. But I left a link with an example of what I mean I had to go back in the replay to record it, but my plan was to teleport and end since I was very ahead but when I teleported I started walking fine, my first Q was delayed which is why it was just in the air, then I auto'd the tower took a step back and froze. I couldn't auto move or use any abilities and then the Alistar just killed me and I lost any chance at winning the game.