The paws metrics server intermittently fails which causes unexpected problems like an inability to delete a namespace.
You can observe this by running kubectl top pods repeatedly. The logs give:
E0630 19:58:43.262860 1 authentication.go:53] Unable to authenticate the request due to an error: x509: certificate has expired or is not yet valid: current time 2021-06-30T19:58:43Z is after 2021-05-26T18:12:12Z in the metrics server pod. Not sure which x509 is the problem yet.