Jenkins redirecting to http url even though jenkins_url is configured to be https

I don't know what component does it belong to.

I have jenkins behind a https gateway. Gateway gets request at 443 and forwards to jenkins running at 8080.

It works fine for many urls but when I click on any plugin/job url which doesn't end in `/` then jenkins redirects to an http url with a `/` at the end, which breaks because there's no http.

I already have the https url configured in ConfigureSystem settings, yet jenkins keep redirecting to a http url.

It's probably duplicate of https://issues.jenkins-ci.org/browse/JENKINS-10675