Hi Lilla, thanks for the help!
I believe I will need to remove the site, and then reintegrate.
A2 has confirmed there is not a caching mechanism on their side, nor any caching active through the site itself. So this leaves me as the previous iteration of the integration as the culprit.
I've confirmed that the nameservers have been pointed away from Ezoic, and the Ezoic WP plugin removed from the initial host, and the current host. However, the site is still showing as integrated so I'm unable to remove it.
Could it be manually removed in this case?
Thanks!