Can't get "Item Mapping" in the output of custom action in integration

[And (A D)]

Hi!
I am trying to create an integration receipt with custom action and found a problem with output.
My receipt contains a build-in trigger “When column changes”, docs here
I also created a custom action with fields that are described in trigger’s docs:

When I use this integration, I get results with all fields except “itemMaping”. That is the POST request that my application got, there is no “ItemValues” here:

Please help, why this happens? Also I’ve tried to do the same with build-in trigger “When Button Clicked” but got the same results.

[And (A D)]

Also I’ve found another topic with the same question, but there is no answer:

Item Mapping - When a Status Changes to Something

Hi, Item mapping is a trigger output of “When a Status Changes to Something” in the built-in trigger. However, I do not received this itemMapping payload. Any suggestions Why? link of the documentation : https://apps.developer.monday.com/docs/monday-trigger-blocks

[jcrum (Jonathan Crum)]

It would be nice if monday could follow up with this - it’s a year later and it’s still exactly the same.