[GAMEPLAY] Casting abilities on Lucian too fast in URF results in him not being able to cast his e

Since URF this time around is ARURF, I can't test this out again until the next time I get Lucian, but I encountered this bug just a few minutes ago while playing around. A lot of people know how Lucian can cancel his passive auto animations by using abilities as soon as he starts his initial auto animation, and by abusing this in URF, you're able to cast Lucian's e pretty much with no cooldowns at higher ranks, as long as there are targets to proc his passive autos. So in my game, I was just cruising by and abusing his passive autos and low cooldowns that URF grants us with (god bless), and i noticed that when I pressed e, my character (Lucian) wasn't dashing like it was supposed to. At first, I thought it was because my keyboard dc'd or something, so I pressed another ability to make sure it didn't dc (other keys were working fine). Then I looked at my ability icons. I noticed that the dash (e) icon was dimmed (kind of like how if you activate Nasus' q and not attack anything), and not on cd. I also tried to see what else it affected and another thing that I found was that I also couldn't ping the ability (the whole "ready" "on cd" type of thing). That last sentence was just to give more information on the bug encountered.

ADDITIONAL POINT: the bug resets once you (Lucian) dies, but it can happen multiple times (I know because it happened to me around four times in the course of 10 minutes)