In InDesign 2014 I used Document.layoutAdjustmentPreferences.enableLayoutAdjustment to make text boxes and images adjust to new measurements of a page and it worked pretty well.

In InDesign 2019 I understand it has been replaced with Document.adjustLayoutPreferences.enableAdjustLayout and I can trigger it with my script but it doesn't work as before - text boxes and images remains on the original place.

If I use the function manually, without scripting, it works fine, text and images adjusts to the new measurements.