Tryndamere Ulti works while Guardian Angel is activated

honestly unsure if this is a bug, but it have been around for a very long time for some odd reason, while Trynd have GA, and he uses his ulti right before the 5 seconds mark, and he somehow gets blown up GA will actually pop , and his ulti goes into the 5 seconds lapse while you see the GA animation, leaving you unable to do anything as your ulti get wasted away. it sometime does the same thing when Zil ulti him as well, i have had this happened to me for over a year now on multiple occasions if anyone else have, please pitch in,

thanks