Handle issue move to other project using webhook

Problem to solve

I’m using a free version of GitHub in our company, currently I’m trying to handle issue move(migration) from one project to another with the help of webhooks.

GitLab Configuration

I have a group with two projects in it, both projects have custom webhooks with all marks enabled. When I move issue from one project to another using default GitLab UI functional (button), I expect to get some info by webhook in field [object_attributes][moved_to_id], but this field contains null value.

Question

What am I doing or how can I handle issue movements in other way