Glad we cleared it up. About the system prompts: the routing and model serving on our side didn’t change for you. Composer 2.5 has been served as Composer 2.5 both before and after 20.06, with no hidden switch.
If you catch a specific bad reply again, please send the Request ID for that exact assistant message use the 3 dots on that message in chat, then the team can look at that exact session. With a general “it got worse” report and no specific ID, there’s unfortunately nothing we can diagnose.
The best place to leave model feedback is here: Share your Thoughts on Composer 2.5! the team checks it. Let me know if anything feels off again.