There is a bug for combination of IBC and WP. When IBC and WeihgtedPredB or WeihgtedPredP are set to 1, the results between encoder and decoder are not identical. The following changes should be introduced.

In /source/Lib/CommonLib/InterPrediction.cpp,
void InterPrediction::motionCompensation( PredictionUnit &pu, PelUnitBuf &predBuf, const RefPicList &eRefPicList
  , const bool luma, const bool chroma
  , PelUnitBuf* predBufWOBIO /*= NULL*/
)

  if( eRefPicList != REF_PIC_LIST_X )
  {
    CHECK(predBufWOBIO != NULL, "the case should not happen!");
    if( ( ( sliceType == P_SLICE && pps.getUseWP() ) || ( sliceType == B_SLICE && pps.getWPBiPred() ) ) )

->

    if( ((CU::isIBC(*pu.cu)==false) && ( ( sliceType == P_SLICE && pps.getUseWP() ) || ( sliceType == B_SLICE && pps.getWPBiPred() ) ) )

When the input parameter InternalBItDepth is set to the value which is greater than 10, although the encoder outputs the bitstream, the decoder outputs “Segmentation fault” and is crashed. This bug should be fixed until VTM-10.0 quickly due to study high bit-depth coding.

A solution is that in DecLib.cpp, the codes from line 1941 to line 1947 should be off when the profile is “none”.

As can be seen from here: ​https://vcgit.hhi.fraunhofer.de/jvet/VVCSoftware_VTM/-/merge_requests/1944#note_17322

When implementing the following constraint:

When there are multiple SEI messages with a particular value of payloadType not equal to 133 that are associated with a particular AU or DU and apply to a particular OLS or layer, regardless of whether some or all of these SEI messages are scalable-nested, the SEI messages shall have the same SEI payload content.

A bug in the text of the constraint was identified. If a picture has four subpictures, each of which is associated with an SEI message, e.g., the decoded picture hash SEI message, contained in a scalable nesting SEI message with sn_subpic_flag equal to 1, then per the current wording of the constraint, the four SEI messages shall have the same payload content. That's incorrect and not the intent.

Therefore, in the constraint, "OLS or layer" should be changed to be "OLS, layer, or subpicture", which is the intent.