Pipeline event webhook does not always contains variables

Pipeline webhook event seems to define a field object_attributes.variables, but the only time it is different of [] is on manual pipeline from the user interface, and only contains the additional variables set by the user.

I would like to propose to dump all non-protected and non-masked variables into object_attributes.variables, at least:

• project settings "CI/CD Variables"
• manual variables added by user trigger
• added variables throught scheduler

Thanks