Hello,
I had a fight against havoc on thorns node (16). I had 10 plasma charges on me, so I was hitting Havoc to pass the plasma detonation damage back to him (Namor sending the damage as energy damage and you can see there that thorns damage sent back to havoc when I'm attacking him). Here you can see that isn't working as intended:

High resolution:
https://imgur.com/a/KLlyggXYou can see that no plasma damage is back.
If you wonder what is the plasma damage is:

This bug is another Namor bug comes with many more that I've reported and shared with a lot of details. I really hope you will look into it