The green is the default head overlayed on top of the Fragmented Robloxian bundle showing that the chin is unnatural.
Expected behavior:
The head should either be moved up with SpecialMesh Offset (like in the photo above) or be edited to account for the chin in the front that makes the head appear lower down than usual.
I believe this is due to the mouth itself being positioned very low in R6 compared to the epic face. The mouth in both R6 and R15 remains the main problem after the most recent update of the bundle, apart from the white dots in the eyes when blinking in R15.
Thanks for flagging this. This was a great catch. We modified the chin so that the chin is more like the Default Head and doesnβt jut out nearly as much.