pinterf's test version had fixed the errors in this post with the internal avs conversion
https://forum.doom9.org/showthread.php?p=1897686
pinterf test version
https://forum.doom9.org/showthread.php?p=1898860
But using the recent 3.5, r3043 , some differences are back. 12bits again "fixes" it
avsresize/zimg/zlib works using 10bits with either version