Despite having the proper Field Level Security (FLS) and configuration, custom zvod fields are not displaying from Cycle Plan Detail records
This happens when the section label for Cycle_plan_detail_vod is translated using the Translation Workbench. If this value is translated, the application cannot pick up the section and related fields.
The Cycle Plan Detail page layouts are not accessed directly by the user. They are used to display information in other related areas of the application. Since the user does not interact with the page layout directly, there is no need to translate it. Removing the translations resolves the issue.
CRM Help Documentation: Custom Fields on Cycle Plan Targets