- Client-go: Informer resync processing improved handling of Resync handling. This reduces contention on store locks between incoming events and handler updates, which may result in observable timing differences of handler invocations. This behavior is guarded by an AtomicFIFO feature gate. This gate is enabled by default in 1.36, but can be disabled if needed to temporarily regain the previous behavior. ([#136008](https://github.com/kubernetes/kubernetes/pull/136008), [@mic...

    This helps prevent "split brain" scenarios in clustered applications by
    ensuring that unreachable pods will not be presumed dead unless some
    "fencing" operation has provided one of the above indications.
  * For all other existing controllers except StatefulSet, this has no effect on
    the ability of the controller to replace pods because the controllers do not
    reuse pod names (they use generate-name).