Tryndamere wasted R/ult bug [GAMEPLAY]

Tryndamere is my main champion, I play him a lot and know him inside and out. There is a bug with his R that, if used on the brink of death, will consume his R (activating the cool down timer) but will cause him to still die instantly instead of working correctly. Not sure if the code accidentaly ignores a certain champion's damage towards Tryn during his R or what but this has happened to me many times. Sorry I don't have pictures!

To recreate the bug I would say, attempt to get Tryn very low on the brink of say 1-5 hp or so and then use his R as soon as he takes damage, this would be most common durring a team fight or so. His R will be consumed and the cooldown timer will activate, this will be accompanied by the audio played when beginning his ult, but you will find yourself (if the bug was done right) well... Dead. It happens to me almost at least once every 3-4 games as Tryn. Not sure if other Tryndameres have ever had this issue.

It's very frustrating considering it's stopping his ultimate from doing exactly what it is supposed to do, and then laughs in your face by still starting the cool down timer, which is longer than the revive timer typically. Please look into this and fix it. (does his R have an activation animation bug maybe?)