Going to start with the sheer basics, but did the start type of the service happened to get modified?
From the CLI you can execute:
vmon-cli --status applmgmt
...and you should get output similar to this:
Name: applmgmt
Starttype: AUTOMATIC
RunState: STARTED
RunAsUser: root
CurrentRunStateDuration(ms): 3055700860
HealthState: HEALTHY
FailStop: N/A
MainProcessId: 2261
If the StartType is not Automatic then you can execute
vmon-cli --update applmgmt --starttype AUTOMATIC