I remembered I still had those heads here from last year that I finished up the repairs on.
Those had been run with a .700 lift roller cam.
I checked them out and the contact pattern in the saddles from the shafts looked fine, so I stuck a shaft on the head to see how it felt.
No wiggle at all......... so it would appear this issue isn’t present on all the heads.

If I get another set in the shop, it’ll def be the first thing I check.