Plz explain this

Feel free to filter my vulgar use of the English but, I feel its an accurate analogy. I put this in bugs as you can hear with utmost accuracy my Vel Coz E was both launched and hit before the animation began for Hecarim's AA meaning not only is the tart equestrian cc immune during ult but also during his E. My ultimatum is this either specify in the tooltip or fix it. As for whether it affected that particular match is a negligible variable overshadowed by the sheer idiocy of my teammates.