py7zr stopped working after version 0.18.4.

[knuselme]

py7zr stopped working in my environment between version 0.18.4 and 0.18.5. And still not working for any new versions. The problem seems to be that following if-statement was removed: In the compress.py module, class SevenZipDecompressor, function _decompress:

"if isinstance(decompressor, LZMA1Decompressor) or isinstance(decompressor, PpmdDecompressor):
data = decompressor.decompress(data, max_length) # always give max_length for lzma1
else:
data = decompressor.decompress(data)"

Replaced by:
"data = decompressor.decompress(data, max_length)"

which does not work for me.
I have successfully manage to append the if statement in version 0.22.0.
But I rather see a offical fix for this. Any possibilty for that?