OMG u are right. This is insane for a default behavior.
Alright, I have done the above. From that link, opened in a completely separate browser with no NIP-07 extension, so I was logged out the entire time, I just had to do the following:
Click on nostr:npub10mtatsat7ph6rsq0w8u8npt8d86x4jfr2nqjnvld2439q6f8ugqq0x27hf's reply, click on your next reply, then click on nostr:npub13thhtj384uq2dacvzjr94efgvrxdcd50geyecl8kkg6jkzd8p86sgtwvcs's reply. And there I am:
Discussion
One of the many reasons I rarely use Primal for anything but search.