You can no longer add groups as collaborators in game settings permissions

As recently you can no longer add groups as collaborator in the game settings permissions.
When you try to add a group to it, it will only show users.
Whatever group you try to search, it will always show usernames instead.

I don’t know when this bug started happening as I don’t often use this feature. But I can confirm it’s already from 08/02/2020 (Saturday) possible before.

Example of the bug, trying to search for “Fros Studio”:

If the GIF doesn’t work, here’s a picture:

Edit: This also doesn’t work for non-group games to add groups as permission.