I am using form customization to hide parts of the Articles add-on when a user updates / creates a new blog post.
I located the ID of the div and added it as a region in form customization and then deselected visible, everything was working fine or so I thought.
When I go back into the SET to check it my custom tab is nowhere to be found, although the div ID is still hidden and appears to be working ok when viewed. the same happens when I duplicate a SET, my custom region ID's disappear.
I had the problem in MODX Revolution 2.2.8-pl (traditional) so I upgraded to MODX Revolution 2.2.9-pl (traditional) but it still seems to be a problem.
I am not sure what other info I can offer, does anyone else have problems using form customization?, I did a search and found a few problems similar to what I am experiencing but they were on earlier versions of modx revo.