Me and
@e30ernest were testing, and Entropy Consumers seem to consume Entropy only when built by certain builders.
For example, Entropic Redistribution consumes Entropy totally fine when it's built by Channeled Deconstruction or Recursive Shearing. However, when Entropy was built by Entropic Cascade or Chronometric Inversion Field - ER took away no Entropy.
We didn't have lots of time, thus couldn't go through too many variations, so it's possible it's only Entropic Redistribution that acts weird.