Platform & DevOps·Packaging: containers and images
you pushed a fix under the same tag, restarted the workload, and the node kept running the copy it already had.
Image pull policy
Also calledpull policy, imagePullPolicy
The rule for whether a node fetches an image it already has cached. Always pulling costs registry traffic and start-up latency; never pulling makes start-ups fast and makes mutable tags actively dangerous. It is the mechanism behind the classic confusion where a rebuild appears to have no effect on some nodes and to work on others, depending on what each had cached.