How to stop the abuse detection mechanism

Hello, a collaborator of mine, was editing a wiki in my public repository with wiki editing restricted to collaborators (i.e. a clearly people that is supposed to edit the wiki). And for some reason, his access has been restricted without an obvious reason why. I tried to figure out how to stop the abuse detection mechanism, but I could not figure it out? How comes it gets triggered by a person that is listed among collaborators? And how can I stop it?