Google Cloud Storage TextIO read fails with gz-files having Content-Encoding: gzip header

Content-Encoding: gzip
Content-Type: application/octet-stream

ERROR:root:Exception while fetching 341565 bytes from position 0 of gs://...-c72fa25a-5d8a-4801-a0b4-54b58c4723ce.gz: Cannot have start index greater than total size
Traceback (most recent call last):
  File "/Users/samuli.holopainen/miniconda2/envs/python-dataflow/lib/python2.7/site-packages/apache_beam/io/gcp/gcsio.py", line 585, in _fetch_to_queue
    value = func(*args)
  File "/Users/samuli.holopainen/miniconda2/envs/python-dataflow/lib/python2.7/site-packages/apache_beam/io/gcp/gcsio.py", line 610, in _get_segment
    downloader.GetRange(start, end)
  File "/Users/samuli.holopainen/miniconda2/envs/python-dataflow/lib/python2.7/site-packages/apitools/base/py/transfer.py", line 477, in GetRange
    progress, end_byte = self.__NormalizeStartEnd(start, end)
  File "/Users/samuli.holopainen/miniconda2/envs/python-dataflow/lib/python2.7/site-packages/apitools/base/py/transfer.py", line 340, in __NormalizeStartEnd
    'Cannot have start index greater than total size')
TransferInvalidError: Cannot have start index greater than total size

WARNING:root:Task failed: Traceback (most recent call last):
  File "/Users/samuli.holopainen/miniconda2/envs/python-dataflow/lib/python2.7/site-packages/apache_beam/runners/direct/executor.py", line 300, in __call__
    result = evaluator.finish_bundle()
  File "/Users/samuli.holopainen/miniconda2/envs/python-dataflow/lib/python2.7/site-packages/apache_beam/runners/direct/transform_evaluator.py", line 206, in finish_bundle
    bundles = _read_values_to_bundles(reader)
  File "/Users/samuli.holopainen/miniconda2/envs/python-dataflow/lib/python2.7/site-packages/apache_beam/runners/direct/transform_evaluator.py", line 196, in _read_values_to_bundles
    read_result = [GlobalWindows.windowed_value(e) for e in reader]
  File "/Users/samuli.holopainen/miniconda2/envs/python-dataflow/lib/python2.7/site-packages/apache_beam/io/concat_source.py", line 79, in read
    range_tracker.sub_range_tracker(source_ix)):
  File "/Users/samuli.holopainen/miniconda2/envs/python-dataflow/lib/python2.7/site-packages/apache_beam/io/textio.py", line 155, in read_records
    read_buffer)
  File "/Users/samuli.holopainen/miniconda2/envs/python-dataflow/lib/python2.7/site-packages/apache_beam/io/textio.py", line 245, in _read_record
    sep_bounds = self._find_separator_bounds(file_to_read, read_buffer)
  File "/Users/samuli.holopainen/miniconda2/envs/python-dataflow/lib/python2.7/site-packages/apache_beam/io/textio.py", line 190, in _find_separator_bounds
    file_to_read, read_buffer, current_pos + 1):
  File "/Users/samuli.holopainen/miniconda2/envs/python-dataflow/lib/python2.7/site-packages/apache_beam/io/textio.py", line 212, in _try_to_ensure_num_bytes_in_buffer
    read_data = file_to_read.read(self._buffer_size)
  File "/Users/samuli.holopainen/miniconda2/envs/python-dataflow/lib/python2.7/site-packages/apache_beam/io/fileio.py", line 460, in read
    self._fetch_to_internal_buffer(num_bytes)
  File "/Users/samuli.holopainen/miniconda2/envs/python-dataflow/lib/python2.7/site-packages/apache_beam/io/fileio.py", line 420, in _fetch_to_internal_buffer
    buf = self._file.read(self._read_size)
  File "/Users/samuli.holopainen/miniconda2/envs/python-dataflow/lib/python2.7/site-packages/apache_beam/io/gcp/gcsio.py", line 472, in read
    return self._read_inner(size=size, readline=False)
  File "/Users/samuli.holopainen/miniconda2/envs/python-dataflow/lib/python2.7/site-packages/apache_beam/io/gcp/gcsio.py", line 516, in _read_inner
    self._fetch_next_if_buffer_exhausted()
  File "/Users/samuli.holopainen/miniconda2/envs/python-dataflow/lib/python2.7/site-packages/apache_beam/io/gcp/gcsio.py", line 577, in _fetch_next_if_buffer_exhausted
    raise exn
TransferInvalidError: Cannot have start index greater than total size