2 posts in the Ward journal on this subject. Each one names the data it rests on, the tool that produced it and the claim it makes, at the bottom of the page.
Username and password in a SOCKS5 proxy URL are ignored by Chromium, silently. The fix is a local forwarding relay, and it solves a second problem too.
The cheapest contradiction to detect in a proxied session, and the one most tools leave to the operator. Why Ward derives the timezone from the exit probe.