Sona ult invisible

Hello, I've had this bug in a match where I couldn't see Sona's VFX on her ultimate. Sona couldn't see the ult either, but a guy in her team said he could(don't know if he was lying or not). Couldn't reporoduce(forgot to ask one of my friends to get into a custom with me), but if someone could test this it would be nice. I will also try to test this and come back with an edit to see if it occurs again.