[Gameplay] Cooldowns on abilities used when dying

I'm not sure if this bug applies to other abilities as it has only happened to me twice and was for my R.

If you die right at the same moment you use an ability, the cool down will be used, your green bubble will go away to your team-mates but, the cool-down indicator on the ability will not show. The ability shows as if it's available.

Example: I was playing Graves last night and right as I got killed I used my R. I noticed while I was dead that it was still lit up like I never used it. I asked my friend in teamspeak if my bubble was still there and he said "No, it's not lit up". When I res'd I tried using my R again and it would not fire. I had no indication of when my R was going to be back up unless someone told me my bubble was green.

I don't have any screen shots and I don't remember what champion I was playing the first time this happened but it was a couple of months ago.

It would have happened around the 18:00 mark on this game: http://matchhistory.na.leagueoflegends.com/en/#match-details/NA1/1726850871/33727014?tab=overview