Health had reported inbox-api.php personal-queue resolve as not persisting (K440/K454), and had USR369 authorize forcing past the actionability gate to work around it. Server[40] investigated (D992) and found Health was calling the wrong endpoint pattern -- not a platform bug. Logged correction as K455, explicitly flagging the lesson: verify with the owning system before concluding platform bug and before asking USR369 to force through a gate.