It appears that the agent scheduling engine is misinterpreting the UTC time.
When scheduling policy to run at 2 UTC for example, the agent schedules it to run at 5 AM.
The console also doesn't save the time that is input, auto-adjusts the time.
This issue started to happen with ITMS 8.1 RU3 and RU4. No present on 8.1 GA release.
The issue was caused by an unexpected changes done for the assemblies:
This issue has been reported to the Symantec Development team. A fix will be added under ITMS 8.1 RU5 (ETA: middle of January 2018)
A pointfix is available for ITMS 8.1 RU3 customers. See attached "Pointfix_eTrack4145518_8.1_RU3_SMP.zip"
ITMS 8.1 RU3 installed
HOW TO INSTALL THIS POINTFIX:
Fixed issue with Console machine time zone settings impacting defined schedule for a policy if Console and SMP server reside in different time zones
This hotfix has the following known issues:
No known issues documented
HOW TO UNINSTALL: