This doesn’t explain why you’re setting it to 0.01. If you want to disable distance field generation on a particular object you can just set the resolution to 0. Setting it to a “low number” just hobbles the resolution.
If you don’t want it to affect DFAO you can also just uncheck “affects distance field lighting”
I can’t see the original authors issue because this post is 5 years old, but more than likely they needed to adjust their resolution slightly to get rid of the black spots but there is no need to disable the distance field or set it to 1% scale.