The ball is in Apple's court now, since there's no public API to override the proxy. Bc CipherML is a separate system-level daemon, the NetworkExtension profile might not be enough to un-redact errors. You might need to install the Sys Logging Profile (with "Enable Private Data" toggled on) from the dev portal to see the ⁠Code 1800⁠ details. Your best bet might be to take the Feedback ID to a WWDC Networking/Privacy lab for a framework engineer, since they deal w bundle ID provisioning bugs.