I tried logging into Discourse in an incognito window, not yet logged into inaturalist.org there, and got the whale shark mentioned on the Google Group.
I then logged into my iNaturalist account on inaturalist.org, then tried logging into Discourse again. Worked fine.
Getting logged out of my iNaturalist account when I shouldn’t be is a frequent enough issue (also mentioned a lot by others on the GG) that I can see this potentially being annoying.
Edit to add: whoops, just saw the new posts on the GG : )