Load data repeatedly in class CSVIterableDataset from monai/data/iterable_dataset.py

Describe the bug
In iterable_dataset.py

def __iter__(self):
    if self.shuffle:
        self.seed += 1
        buffer = ShuffleBuffer(
            data=self._flattened(), transform=self.transform, buffer_size=self.buffer_size, seed=self.seed
        )
        yield from buffer
    yield from IterableDataset(data=self._flattened(), transform=self.transform)

This may cause loading data repeatedly, and maybe the code should be

def __iter__(self):
    if self.shuffle:
        self.seed += 1
        buffer = ShuffleBuffer(
            data=self._flattened(), transform=self.transform, buffer_size=self.buffer_size, seed=self.seed
        )
        yield from buffer
   else:
        yield from IterableDataset(data=self._flattened(), transform=self.transform)

If I understand the logic in the code incorrectly, please point it out directly, thanks a lot.
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Expected behavior
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Environment

Ensuring you use the relevant python executable, please paste the output of:

python -c "import monai; monai.config.print_debug_info()"

Additional context
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Start in monai/data/iterable_dataset.py at CSVIterableDataset.iter and compare the shuffle and non-shuffle paths shown in the report. Reproduce the iteration behavior and verify that data is not loaded or yielded repeatedly when shuffling is enabled; the issue is done when the intended single path is confirmed and covered by an appropriate check.