Comment by selenamarie

I'm working on our DoH implementation. I'm guessing this is a split-horizon set up with a domain that resolves both internally and externally. If you are willing, we're very interested in these situations and coming up with heuristics to detect and disable DoH proactively. We're also looking into standards changes that could make these configurations more reliably detectable at the application level. I'm selena at mozilla.com.