Invisible walls preventing ally from leaving base

Don't know how it was caused, but it caused one of our players to be down 7 levels by the time he was able to leave the base.

The nexus walls that normally hold you until 15 seconds never left for this player.

It was a long loading screen, that is all I can say, no idea what it would be caused by.

However a loss prevented on the game would be much appreciated.