Cluster upgrade stuck with failed to update OS to quay.io in RHOCP4

Issue

• Cluster upgrade stuck with the worker MachineConfigPool (MCP) reporting the below error:

      Reason:
      Status:                True
      Type:                  Updating
      Last Transition Time:  2025-07-13T15:23:49Z
      Message:               Node <node_name> is reporting: "failed to update OS to quay.io/openshift-release-dev/ocp-v4.0-art-dev@sha256:ad2174094abfb7182f223f9651d9929899a7ed5ceacf3c4eaad5c89eae687f39 : error running rpm-ostree rebase --experimental ostree-unverified-registry:quay.io/openshift-release-dev/ocp-v4.0-art-dev@sha256:ad2174094abfb7182f223f9651d9929899a7ed5ceacf3c4eaad5c89eae687f39: \x1b[0m\x1b[31merror: \x1b[0mImporting: proxy failure: remote error: read tcp 10.XX.XX.XX:38778->10.YY.YY.YY:8080: read: connection reset by peer and client error: Layer sha256:a233fe07bac5afca6f5bfaaec7e60bca65dfc8cd5495f2e6c9b9e177558916bc: unexpected end of file\n: exit status 1"
      Reason:                1 nodes are reporting degraded status on sync
      Status:                True
      Type:                  NodeDegraded