team builder to blind pick bug

Earlier today i was in a team builder queue when i got frustrated on how long it was taking to find a support. So I disbanded the group and went into blind pick. Halfway through champ select a popup appeared that said " A match has been found. Do you want to continue with what you are doing?" I clicked yes and the champ select screen disappeared but the music was still going. I waited for the music to end and re-queued. Worked fine. Not sure what happened [zombie-brand-mindblown]