[PC] Metro Exodus, lz4 decompress block fail - anyone can help me

[chphat11]

Hello, I use K4os LZ4 Compression C# for decompress

BinaryReader br = new(input);
while (br.BaseStream.Position < br.BaseStream.Length)
{
    uint BlockSize = br.ReadUInt32();
    uint DecompSize = br.ReadUInt32();
    byte[] BlockData = br.ReadBytes((int)BlockSize - 8);
    byte[] DecData = new byte[DecompSize];
    int len = K4os.Compression.LZ4.LZ4Codec.Decode(BlockData, 0, (int)BlockData.Length, DecData, 0, (int)DecData.Length);
    Console.WriteLine("len: " + len);
    Console.ReadKey();
}

The first block, decompress successfully, and the second block, decompress fail

sample.zip