Yeah, when I first saw a Wolver running around on the outside of the map, I just assumed lag was playing tricks on me or something. Then later on as my Partner and I made it to the Wolver Den the Mission was talking about it happened a second time and we were both rather surprised.
Here's a Screenshot I took: http://steamcommunity.com/profiles/76561198029637348/screenshot/48775225...
It also happened again in a later Mission, only this time I happened to shoot it with my Callahan. The Coins and Heat dropped then proceeded to remain outside the map boundaries floating on thin air which we cant get to; http://steamcommunity.com/profiles/76561198029637348/screenshot/48775225...
It happened a third time in an Arena where the final Wolver warped to the other side of the locked Gate. Thankfully it only stayed there for a few seconds, long enough for us to express our surprise and get out of the way before it warped behind the team Bomber and bite him.
It ain't that problematic of a bug but its still a bug so I figured I'd best report it. Anyone else see these crazy Wolvers running around as well?