Foulborn Voll's Vision numbers are off

sometimes poe needs PHD to play, but this one looks just wrong.

165 life regen + 20% to ES should be around 33, right? instead i have 23 ES regen an no ES regen mods whatsoever.

I also am confused by this interaction.

I have 3425.6 life regen and 304.4 es regen

I thought perhaps it had to do with life regeneration rate
But I have around 50% of that, so even then if I had 2kish regen, I should still be around 400 es regen.