I couldn't see anyone in my team O_o

It started with a strange dc. I was watching all the match (ARAM) but I couldn't move. Then it all stoped. When I came back I could click my team icons and get their position, but I couldn't see the champions, not even in the mini map, but the enemy was visible. Had to restart once again to see it. It was so strange, felt like I was alone against 5 but all my team was there.