Calendar are not correctly calculated when creating a Forecast.
The execution may differ between Forecast & actual Workflow execution.
Release : 12.3
Component : Automation Engine
With the introduction of the Next Generation Forecast (v. 12.3) a new forecast model was developed:
https://docs.automic.com/documentation/webhelp/english/AA/12.3/DOCU/12.3/Automic Automation Guides/help.htm#_Common/ReleaseHighlights/RH_AE.htm#link8
During this migration to v12.3 some rarely used Job and Workflow configurations were not included completely in the forecast calculation.
Issue already being worked on by Engineering.
Fix will be provided in a future release (TBD).