Having a similar issue here, also using the poly hammer blender add on for DNA, in my case just trying to edit the position of some bones in the hands, it works inside blender but some way in the process of <export from blender - import DNA to UE> something fails and the edit I did doesn’t show correctly. Im starting to think this is due to the blender add on and not a UE thing since I’ve seen people succesfully editing DNA files with maya, could that be the issue here?
Have you found any solution/workaround or more information?