During a preview "mission" in the editor, the game will freeze to a black screen during play. This happens within an hour of playing. The crash dumps indicate some sort of memory issue.

The black screen is sometimes accompanied by an "out of memory" error from windows. Sometimes the freeze affects the whole system, forcing a restart. The time until the freeze happens varies, sometimes I can do the mission twice before the freeze occurs.

While making my way over to the enemy or shortly after, the freeze will occur. {F22233}