Lightmap Bleeding

As you see below I am having lightmap bleeding problems with organic like shapes. The Light Map resolution is 256x256 with enough padding.But i am still having these bleedings. Thank you for your help. I look forward to hearing from you.

This looks to be a lightmap UV issue.

Can you post a screenshot of your Lightmap UV?

Also, is this a custom Lightmap UV or a generated lightmap created in UE4?