https://github.com/openshift/openshift-docs/pull/34992 merged
Moving the bug to verified state as the doc contains the detail explanation about how cluster wide default node selector & a node selector work together, what happens if both of them have the same key.
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 (OpenShift Container Platform 4.6.43 bug fix update), 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-2021:3197
Setting qe_test_coverage flag to '-' as the behaviour seen here is expected and not a bug. Documentation has been added with additional information on project node selector due to which the bug was raised at first.