Version 19.1 has Bug 29256916 - DDL FOR TRIGGERS IS NOT INCLUDED WHEN "PREVIEW DDL" FUNCTIONALITY IS USED fixed but seems to introduce another bugs related to this function:
- Triggers are only included when you have the physical model opened.
- If the physical model is open, ALL triggers fpr ALL tables in this physical model are included in the preview ddl function and not only for the table selected.
thanks for reporting the problem. I logged a bug