Discourse declaring users who liked posts "unknown/deleted" users

It’s happening even on topics with brand-new users whom I haven’t interacted with. They haven’t had time to hate me and mute me yet. :wink:
And I can see it when I am logged out, too.

Oddly enough, it is not happening at a 100% rate. On this post, one like is exposed and the other one is blanked out.