[GAMEPLAY] End screen (exploding nexus) not shown while jhin ulting

i was playing some jhin adc and realy stomped the enemy so they decided to surrender. When the text comes up that they chose to surrender i often use abilities with long cooldown such as flash and heal but this time i used jhin's ultemate, i got off 3 shots before it should go to the nexus and explode but this time it just stayed in possition of the ulting screen. i dont know if this is a bug but just posted to be sure if it was a bug it gets patched.