After a routine certificate rotation, one service pair fails mTLS with unknown authority while everyone else works. Find the break.

The leaf is valid and the root is trusted, yet verification fails. The gap lives in the middle of the chain, and the exact verify code names it before you open a single config file.

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The leaf is valid and the root is trusted, yet verification fails. The gap lives in the middle of the chain, and the exact verify code names it before you open a single config file.

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