[GAMEPLAY] XP glitch (ARAM)(PANTHEON)

Not sure exactly how to reproduce this bug however in an aram game I towerd dove by myself level 3 got a triple kill and died, when i leveled up i got to level 6 and had ult coming back into lane i was turning level 7 by the time anyone else was turning 4. I used snowball before I died and also didnt use my skillpoints until i was dead.