Thank you for your input.
I'd like you to inspect the issue and explain what happened and why (and start to fix that if that's not intended) rather than sharing what you think could have happened.
Unless you're not in position to do that, in which case it doesn't matter you're on the Copilot team (anyone can throw hypotheses like that).
Please also don't tell me we're at the point where we can't tell why AI works in a particular way and we cannot debug issues like this :-(