One option to solve the issue is to use only one skin material, so the SSS understands that everything is part of one same object.
The above means that, for every Skin material you use, the SSS needs to calculate it separately, which is causing the issue.
The suggestion is to use a single Skin material, but with a Corona Multi Shader in the Skin color channel, this will feed all the body textures needed.
Please take into consideration the following:
-The Multi Shader needs to be in Material tag index mode.
-Depending on the order the textures are loaded in the shader, you will have to add the same number of material tags to the object (please see the attached image for more explicit description)
This should work when using the selection tags.
I hope this helps.
Please let me know the outcome.
Regards.