Modern Warfare 2 bug creates invisible walls in Shoot House

Be careful not to run into any invisible walls (pic: Activision)

A Modern Warfare 2 bug that creates invisible walls has caused chaos amongst players. 

Season 1 only kicked off a few hours ago, for Warzone 2 and Modern Warfare 2, adding a bunch of
Source: Modern Warfare 2 bug creates invisible walls in Shoot House