I tried giving it about a minute or two, but that doesn’t seem to make a difference. It seems to work if I train a new model, set that model as active, and then I refresh the page prior to using talk to your assistant.
On another note, if I happen to stop the server and start it back up the chat UI behaves worse. The bot doesn’t reply back at all (but again if I refresh, the conversation recorded is correct). This behavior goes away if I train a new model set that as active, refresh and then chat with the newly trained bot.