.WAV file imports blank

I’ve been ripping some sound from an old UE3 game, and for the majority of the sounds it’s fine, but for just a few they import totally blank. The data’s still there, it’s just importing improperly. Someone suggested swapping the channels from 1 to 2, splitting the tracks, swapping channels, nothing people have suggested works. Anyone know a fix?

Fix found. You need a hex editor to change a 2 to a 1, then split the sound and copy the second half to turn it back to stereo.