The absence of CA quotes on anything these days is quite pervasive, so I don't think you'll be in luck with finding that kind of proof.
But the burden of proof is upon those who claim it to be a hotfix to prove that its a hotfix and not simply a bug introduced when enabling wonders and other features to be visible in neighbouring squares on the battle map.
In the absence of proof of hotfix this is a bug.
And frankly even if it is a hotfix, that implies a patch or free service pack to properly fix it.