terracotta: Getting a 500 when using the newest version of Rasterio (1.0.22)

When deploying a Lambda function through Zappa, using the newest version of Rasterio (1.0.22), we get a 500 for some tiles, while others load fine.

When reverting back to Rasterio 1.0.13 everything works fine.

zappa tail gives the following:

[1554888957364] [ERROR] 2019-04-10T09:35:57.326Z b24c3c65-85ed-4390-a18b-c0cf347feec0 Exception on /rgb/italy/2018/7/70/47.png [GET]
Traceback (most recent call last):
  File "rasterio/_base.pyx", line 213, in rasterio._base.DatasetBase.__init__
  File "rasterio/_shim.pyx", line 64, in rasterio._shim.open_dataset
  File "rasterio/_err.pyx", line 205, in rasterio._err.exc_wrap_pointer
rasterio._err.CPLE_OpenFailedError: '/vsis3/italy-composite/rasters/italy_2018_red.tif' not recognized as a supported file format.

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "/var/task/terracotta/drivers/raster_base.py", line 464, in _get_raster_tile
  src = es.enter_context(rasterio.open(path))
  File "/var/task/rasterio/env.py", line 423, in wrapper
  return f(*args, **kwds)
  File "/var/task/rasterio/__init__.py", line 216, in open
  s = DatasetReader(path, driver=driver, **kwargs)
  File "rasterio/_base.pyx", line 215, in rasterio._base.DatasetBase.__init__
rasterio.errors.RasterioIOError: '/vsis3/italy-composite/rasters/italy_2018_red.tif' not recognized as a supported file format.

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "/var/task/flask/app.py", line 2292, in wsgi_app
  response = self.full_dispatch_request()
  File "/var/task/flask/app.py", line 1815, in full_dispatch_request
  rv = self.handle_user_exception(e)
  File "/var/task/flask/app.py", line 1718, in handle_user_exception
  reraise(exc_type, exc_value, tb)
  File "/var/task/flask/_compat.py", line 35, in reraise
  raise value
  File "/var/task/flask/app.py", line 1813, in full_dispatch_request
  rv = self.dispatch_request()
  File "/var/task/flask/app.py", line 1799, in dispatch_request
  return self.view_functions[rule.endpoint](**req.view_args)
  File "/var/task/terracotta/server/flask_api.py", line 50, in inner
  return fun(*args, **kwargs)
  File "/var/task/terracotta/server/rgb.py", line 85, in get_rgb
  return _get_rgb_image(keys, tile_xyz=tile_xyz)
  File "/var/task/terracotta/server/rgb.py", line 135, in _get_rgb_image
  some_keys, rgb_values, stretch_ranges=stretch_ranges, tile_xyz=tile_xyz, **options
  File "/var/lang/lib/python3.6/contextlib.py", line 52, in inner
  return func(*args, **kwds)
  File "/var/task/terracotta/handlers/rgb.py", line 85, in rgb
  band_data = band_data_future.result()
  File "/var/lang/lib/python3.6/concurrent/futures/_base.py", line 432, in result
  return self.__get_result()
  File "/var/lang/lib/python3.6/concurrent/futures/_base.py", line 384, in __get_result
  raise self._exception
  File "/var/lang/lib/python3.6/concurrent/futures/thread.py", line 56, in run
  result = self.fn(*self.args, **self.kwargs)
  File "/var/task/cachetools/__init__.py", line 87, in wrapper
  v = method(self, *args, **kwargs)
  File "/var/lang/lib/python3.6/contextlib.py", line 52, in inner
  return func(*args, **kwds)
  File "/var/task/terracotta/drivers/raster_base.py", line 466, in _get_raster_tile
  raise IOError('error while reading file {}'.format(path))
OSError: error while reading file s3://italy-composite/rasters/italy_2018_red.tif