A thermal derate window on Ring Three was expected to remain narrow and routine. Instead, admission controls stayed in place long enough to spill deferred work into two neighboring queues.
No critical services were lost. The incident mattered because it showed how quickly a planned heat-management action can become a system-wide scheduling event when rings are operating near their preferred envelope. Once the derate extended beyond its first slot, the platform had to decide which contracts could wait and which continuity promises still held.
Operators later described the event as orderly, which is true and not especially comforting. Orderly rationing is still rationing. Ring Three did not fail. It revealed how little empty thermal room remains when utilization stays high.