Anybody else like to mess around with models from archive3d.net? If so, you’ve probably noticed that some 3DS files don”t seem to import properly — pieces end up in the wrong places.
There is a long-standing bug report about this sort of thing: https://developer.blender.org/T50620 to which I recently added a patch that improved matters a lot for me.
Frankly, I don’t know if any of the Blender developers are still watching that report. But if you care, feel free to give my patch a try.