It looks like (not proved) that 4.7 rebase disabled the sysctl node tests (Feature:Sysctl). These were marked conformance in 1.21/4.8, and must pass before we can submit k8s results for 4.8. https://github.com/openshift/kubernetes/pull/741 tests 4.8 with them enabled. Additional details will be provided depending on result.
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 (Moderate: OpenShift Container Platform 4.8.2 bug fix and security 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/RHSA-2021:2438