Maybe I haven’t dug in enough, but why is the second GET request a different trace?

Is it clicking a different result from same search?

It’s possible that the requirements here are not clear, given that the instructions don’t detail how to handle such a situation and it’s not obvious to me as a human.

Why wouldn't it be, it's a different request.

If you've got an entire distributed system, the same GET request a millisecond later could get routed entirely differently, and succeed or fail. Even the caching layer is suspect.