Authenticated NTP still indicating that is in syn when it is not

Issue

• Authenticated NTP is configured using pre shared symetric keys: https://access.redhat.com/site/solutions/393663.
• It works as expected but if a man in the middle attack is simulated by changing the key on the upstream ntp device (Cisco), RHEL ntp client continues to indicate that it is syncing without problems.
• There are no indications in syslog and ntpq -p still shows the asterix "*" next to the upstream device.
• In ntpq -c as the condition field does switch from sys.peer to rejected:

ind assID status  conf reach auth condition  last_event cnt
===========================================================
  1  6620  e033   yes   yes   ok     reject  lost reach  3