I've noticed this problem several times. Sometimes, I pushed a new containter image version, I click "New release" and input my new container with new version tag, but it won't fire "latest workers", instead, it just shows "stale workers 2" and stuck in there forever.
as you can see in the screenshot, i already bumped the image to "weixuanf/runpod-worker-comfy:nslog15" but it still stuck in stale workers using "weixuanf/runpod-worker-comfy:nslog13"
To work around this, if I change the number of max workers in "Edit endpoint", it may fire new "latest workers" being initializing sometimes ( not always)