In editor I have placed various ammo boxes and a couple of the Marksman DLC players in a grouping to test things out. Upon hitting preview, the game loads for a little bit, then closes. No error messages or freezing it just closes.
Just placing a Marksman DLC player is fine and the game loads up without a problem. It's seems to be when the ammo boxes are present that the issue arises.
This problem occurs in both Development build and Release candidate build. {F25901} {F25902}