Mind Over Body's regen vs Kaasha's Blessing from Sigil

I think Mind Over Body's "Regeneration" effect is blocking Kaasha's Blessing - mind you, I don't think they should stack, the blessing should probably overwrite if anything, but ti seems to just.. never proc. Stood around for several fights for several minutes and never had a proc, as soon as I nixed Mind Over Body it started popping up every fight or two reliably. When trying to use Mind Over Body while Kaasha's is active is says it failed due to conflict.

I removed the conflict, but lowered the healing amount of Kaasha's Blessing.