GitLab team on other hand is unyielding, they love adding their "Closes #" in MRs and don't care about people that ask to get rid of it.

What is this referring to? Is GitLab using AI to guess which issue a merge request is meant to fix?

	▲	zvqcMMV6Zcr 4 hours ago \| parent [-]
		No, they detect issue symbol in branch name or commit title and add "Closes #123" at the end of merge request description.