As described in section 8.5.2.1.5, the 2nd step of the ordered steps of deriving the motion vector predictor mvpLX:

If both availableFlagLXA and availableFlagLXB are equal to 1 and mvLXA is not equal to mvLXB, availableFlagLXCol is set equal to 0, otherwise, the derivation process for temporal luma motion vector prediction in subclause 5 is invoked with luma location ( xP, yP ).

It seems that we should append a checking before deriving the TMVP candidate in the function "fillMvpCand" of the file "TComDataCU.cpp" of HM6.0-rc1 as follows:

if (pInfo->iN < AMVP_MAX_NUM_CANDS)
{
if ( getSlice()->getPPS()->getEnableTMVPFlag() )
{
........
}
}

In this way, we can eliminate the unnecessary burden of deriving TMVP.

After deriving the TMVP candidate, we can delete the following statement, because it is impossible to satisfy the judgment.
if (pInfo->iN > AMVP_MAX_NUM_CANDS)

{

pInfo->iN = AMVP_MAX_NUM_CANDS;

}