We've had several issues reported in the past where the administration and account consoles had stopped working behind a proxy when different hostnames were configured for the Keycloak server itself and the administration console (see #30541, #30432 and #29641). This was mostly caused by the admin console trying to load resources from the Keycloak server, or the other way around, where one of these is not reachable.

In order to prevent regressions from occurring in the future we should have a basic set of test that run the Keycloak server behind a reverse proxy and test that both the administration console and account console load correctly without any requests failing.