SEPM version: Version: 12.1.4023.4080
When I go to Monitors > Logs > NTP > Attacks, the result is empty. No filters except the default "24 hours".
I can confirm that I have personally seen 2 alerts from my machine's SEP client. If it is a false positive, then it should still be logged so that I can confirm. Version should not matter. If there is an alert, it must be logged.