Tried an export with your export settings then imported into Hex, Maya, Max, Lightwave, Carrara and Z-Brush, and I can't make it do that. 

There are no breaks in the mesh, except for the pieces that are intentionally not attached (Eyes, Mouth, Eyelashes), and certainly not as they appear in your image. It looks like, from your image, your import is breaking the mesh along the Material Zone lines and possibly the group lines as well.