All master nodes are SchedulingDisabled and maxUnavailable configured to more than 1 in the master MachineConfigPool in OpenShift 4

Issue

• All master nodes are in SchedulingDisabled:

  NAME       STATUS                     ROLES                         AGE    VERSION
  master-0   Ready,SchedulingDisabled   control-plane,master,worker   14d    v1.26.6+6bf3f75
  master-1   Ready,SchedulingDisabled   control-plane,master,worker   14d    v1.26.6+6bf3f75
  master-2   Ready,SchedulingDisabled   control-plane,master,worker   14d    v1.26.6+6bf3f75
  

• The master MachineConfigPool is degraded and the DEGRADEDMACHINECOUNT shows the 3 nodes degraded:

  NAME   CONFIG  UPDATED  UPDATING  DEGRADED  MACHINECOUNT  READYMACHINECOUNT  UPDATEDMACHINECOUNT  DEGRADEDMACHINECOUNT  AGE
  master         False    True      True      3             0                  0                    3                     22h
  

• The master MachineConfigPool have configured the maxUnavailable field to a value higher than 1:

  maxUnavailable: 3