Thorns Damage Capped?

At 94% thorns against the training dummy I received 3 damage and reflected 33 damage. Blocking mitigated the damage received but not the damage reflected.
At 36% thorns, with only one armor piece equipped, I took 4 damage and reflected 11 or 12. This suggests that at 100% thorns, I would deal 35 reflected damage

i guess is just lvl.

You are lvl 30.
100% thorns will damage any attacker for your lvl for 30 dmg. No matter of attack dmg, mitigation and other things. Higher/lower lvl enemies will get little more or little less of that. Thats it.

How Do Thorns Actually Work? - #5 by Eranise - tested thorns today. Have a look plz.