In crs alert.log, below message is seen every 30 minutes in 12.2.0.1 GI.
[OCTSSD(9932)]CRS-2412: The Cluster Time Synchronization Service detects that the local time is significantly different from the mean cluster time
ctss is running in observer mode, because NTP is running.
$ crsctl check ctss CRS-4700: The Cluster Time Synchronization Service is in Observer mode.
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