Composer not listing custom repository packages

We used Satis to manage our composer dependencies and I have that setup in my composer.json as follow:

"repositories" : [
	{
		"type" : "composer",
		"url" : "https://satis.companyname.com"
	}
],

however some packages are not listed when I try to use the "Manage Composer Dependencies" where I would like to update just one package:

What I am missing here? Is this a bug, a missing configuration or it is just not supported?