[Gameplay], [Warwick], [Ultimate] Warwick's Ultimate is being interrupted by victims CC ability

Throughout 28 games played as Warwick in preseason 7.22 I encountered three times an interaction that I'm not sure if is a bug or feature. Warwick's ultimate

1. went on cooldown, Warwick jumped a step forward, no other animation or damage happened to Rengar who was casting his ultimate and flashed away after Warwick's E fear ended,
2. went on cd, Warwick fully jumped, animation of first attack, first tick of damage but interrupted by Urgot's flip (E) finished winding up (which started before Warwick's usage of Ultimate)
3. this one is similar to the 2) but it was Ahri's Charm (E). This one almost felt understandable because it's more like Cho'gath's knock up (Q)-a delayed CC projectile

One of possible explanation could be that it's not a ingame bug but desynchronisation of game server and my client as I'm playing on poor quality (10% packet loss based on Riot Game's Lag Report based on around 100+ games from within 30 days) Video quality might be low. I used highlights from League Replays recorded on FHD 60FPS but the actual footage is much worse than expected. (any tips on that? with -i5-2500k and gtx1070 I dont think it's my PC problem)

Thanks