Odd. Noticed that when viewing @mosseri from Mastodon his last post was on April 23, despite posting on Threads many times since and within the last 24 hours.
And if I follow him from here, his account doesn't show under my following list, despite indicating that I'm following on his profile.
Glitch? Intentional? How many other federated @threads accounts are like this? (Other threads.net accounts that I'm following seem okay.)