forward/bypass KYC

Could just be that they tightened their detection. These systems usually check way more than IP/cookies now, so if the old setup stopped working that’s probably why.

I wouldn't focus only on the IP here. A lot of these systems build a device and session history as well. If the original verification and the re-verification happen under very different conditions (device, browser, location, network), that alone can trigger extra checks. Consistency often matters more than finding a "better" proxy.