Either enforcement or distribution of patch policies will end after 60 minutes when Patch Policy Enforcement Duration or Patch Policy Distribution Duration are unset.
[ZenworksWindowsService]   [Patch Module]  [Bypassing patch, patch policy time is up: /Bundles/ZPM/Microsoft Corp./2014-May/MS14-023 Security Update for Microsoft Office 2013 32-Bit Edition (KB 2880463)-571776920]    [ZENworks Agent]
This is fixed in version 11.4 - see KB 7016614 "ZENworks Configuration Management 11 SP4 (11.4.0) - update information and list of fixes" which can be found at https://support.microfocus.com/kb/doc.php?id=7016614
Note: For most patch policies with limited number of patches, the timeout won't be reached. But for larger patch policies with many patches, when no timeout is desired,
Workaround: In ZCC / Configuration / Patch Management
Set Patch Management Enforcement Settings and or Patch Management Distribution Settings to enable Restrict Duration. Give it a large value for time so that even larger patches will not timeout.