I've seen several times the entire wing is listed as gone in the damage screen (not just outer wing) and yet the wing out to the engine is still attached, and the engine keeps running. It is, however, totally unflyable, unlike other planes with half a wing still attached.
Only other plane I've seen doing something similar is the P-38, but the 38 only does that because of the tail booms configuration.
Not sure if a bug or not.