Tested with 4.5.0-0.nightly-2020-05-27-000432, issue is fixed, followed the steps in Comment 0, the URL in dev console is https://${console-route}/dev-monitoring/ns/openshift-kube-apiserver/metrics for "Monitoring -> Metrics" tab no parameter is added.
Since the problem described in this bug report should be resolved in a recent advisory, it has been closed with a resolution of ERRATA. For information on the advisory, and where to find the updated files, follow the link below. If the solution does not work for you, open a new bug report. https://access.redhat.com/errata/RHBA-2020:2409