EOG Invuln not working on vlad

So I was winning a game we were killing the nexus and lux threw her e at me. as low hp vladimir i went into my e then zhonyas and then the game ended. and then i came out of zhonyas and then i took damage from lux's arcane comet, maybe scorch as well (my eyes arent my strong point). i was worried it was going to kill me and it seemed as though it may have had i been less healthy. Please try to recreate this by playing vladimir, getting zhonyas and right before the game ends, have an enemy lux with arcane comet throw their e at you, get into the circle, go into your e and then zhonyas before e ends and if the nexus is killed before her e pops you, you should see what i mean. the gold around your health bar goes away while everyone else's shines buglessly. thank you.