[GAMEPLAY]Sona's / comands don't work post win/loss

I do enjoy quickly hitting [enter] /t or /j at the nexus after it hits 0 hp, but I have noticed that Sona(and as far as I can tell only Sona) you hear no sound.

to recreate this simply win a game (or lose) and while you are near the exploding nexus and try any of her / commands. This bug has been around for ages but it has been so minor I never got around to reporting it till now. I already filled out a ticket. The response told me I should make a thread.

I usually use silent night Sona but I have tried using other skins and the problem seems to effect all of them as far as I can tell.