Im digging this currently, I think this is related to .card-cloak not being hidden in this case for some unknown reason, ATM.
My best guess is that something recently made https://github.com/discourse/discourse/blob/master/app/assets/javascripts/discourse/app/mixins/card-contents-base.js#L79 not working.
If I call this._hide() manually from close in user card component, it will correctly work.