Replies were locked per bot, so a long reply in one session held up every
other session's reply with nothing shown. The lock is now per session. A
chat shows the thinking row whenever the user has the last word, rather
than from the bot's face (one per user, shared by every session), so it
shows even while the bot works elsewhere. A task waiting for its busy
computer says so, and a job finishing while another still runs puts back
the running one's face.
Co-Authored-By: Claude Opus 5.5 <[email protected]>