Dual Plane vs Single Plane Manifold with TBI

It was episode 86 of this season of Engine Masters where they were comparing a carb to TBI (Holley Sniper) in a blow through application. But they spent some time talking about how they had trouble tuning TBI on a dual plane.

Might be an issue at full throttle rather than constant state? Don't know.

Looks like people make it work on a dual plane and the manufacturers don't seem to care.

Edit - I should add that I didn't find them saying they couldn't run the TBI on a dual plane. So maybe I am mixing that up with something from a different show.