I've just run the FileMaker Server 15.0.3 updater on my server running 15.0.2. After the update two of my settings in the admin console had been reset back to empty. I had to manually reselect the 2 settings under Detailed Statistics Logging.
The same thing happened with the first installer i ran yesterday. Today i uninstalled then reinstalled filemaker server, then ran the new updater when it became available.
Windows Server 2012 R2 Datacenter