The alarm definition includes a trigger to set the alarm back to normal when Pending storage recommendations were applied.
Under Fully Automated mode, the alarm is triggered and a recommendation is applied, but the alarm is not set back to normal and only can be cleared manually.
vCenter 7.0
vCenter 8.0
This behaviour was changed in the VC7.0 and above where the alarms are not cleared automatically by design.
Engineering team will change the behaviour to have the alarm auto cleared.
Before fix we only can ingore or disable this alarm or manually clear the alarm.