#tf-data Set `warm_start` to false when global shuffling is enabled.
#tf-data Set `warm_start` to false when global shuffling is enabled.

When `warm_start` is enabled, some ops may use the wrong IteratorContext
to prefetch elements. For example:
https://github.com/tensorflow/tensorflow/blob/29561af231863afb3b6b89e3aa8a6a550c2b7bb0/tensorflow/core/kernels/data/prefetch_dataset_op.cc#L197-L199
