Recently there was a thing where VAC would erroneously flag AMD’s antilag+ feature as cheating, and issue a ban.
AMD then quickly disabled the feature by default but now Valve also patched detection for it and is now, at least according to these patch notes, reversing the bans.
Haha, your telling me AMD may need new programmers for their graphics driver implementations?
Pretty sure this is just a management issue, as in they they need to be doing some.