In WPP, the text requires to parse the syntax element end_of_sub_stream_one_bit at the end of each tile line if end_of_slice_segment_flag is equal to 0. It corresponds to the syntax element alignment_bit_equal_to_one and it must be equal to one. It seems that the parsing of end_of_sub_stream_one_bit and the check have not been done in the reference software in WPP. I suggest to add the following code in the function

Void TDecSlice::decompressSlice(TComInputBitstream** ppcSubstreams, TComPic*& rpcPic, TDecSbac* pcSbacDecoder, TDecSbac* pcSbacDecoders)
...
    cSigma.m_CbCounter=0;
#endif
#endif
    m_pcCuDecoder->decompressCU ( pcCU );
    
#if ENC_DEC_TRACE
    g_bJustDoIt = g_bEncDecTraceDisable;
#endif
    pcSbacDecoders[uiSubStrm].load(pcSbacDecoder);

    UInt uiTileRightEdgePosInCU = rpcPic->getPicSym()->getTComTile(rpcPic->getPicSym()->getTileIdxMap(iCUAddr))->getRightEdgePosInCU();
    UInt ruiBit;
    if ( (uiCol == uiTileRightEdgePosInCU) && (pcSlice->getPPS()->getEntropyCodingSyncEnabledFlag()) && !uiIsLast)
    {
      pcSbacDecoder->parseTerminatingBit(ruiBit);
      assert (ruiBit);
    }

    //Store probabilities of second LCU in line into buffer
    if ( (uiCol == uiTileLCUX+1)&& (depSliceSegmentsEnabled || (pcSlice->getPPS()->getNumSubstreams() > 1)) && (pcSlice->getPPS()->getEntropyCodingSyncEnabledFlag()) )
    {
      m_pcBufferSbacDecoders[uiTileCol].loadContexts( &pcSbacDecoders[uiSubStrm] );
    }
...