I’ve done the following steps:
- Importing the Master Page set in the Masterpage Sets section of the right panel
- Selecting all parts in layout Options and select the imported Master Page Set in the Master Page section of Layout options.
The imported set now correctly shows up in the right panel for each part. I can’t see any pattern in when the dropout occurs, it seems just random.
This actual project I’m working on is also created from scratch and not with any old template.
Another strange thing when importing Master Pages is that Paragraph Styles created for the layout gets duplicated en masse.