Spec allows IBC MV to cross the dependent slice boundary.
But HM will generate warning message. BV check is incorrect. It should be disabled.

HM Decoder/Encoder 16.15_SCM8.4
TDecCu.cpp --> Void TDecCu::xReconInter()

The following modified condition should be added to the print message:
#if proposed fix

if (pcSym->getCtu(ctuAddr)->getSlice()->getSliceCurStartCtuTsAddr() != pcCU->getSlice()->getSliceCurStartCtuTsAddr())

#else

if (pcSym->getCtu(ctuAddr)->getSlice()->getSliceIdx() != pcCU->getSlice()->getSliceIdx())

#endif

{

printf("BV (%i,%i) for PU%i(%u)/%i in CU %u,%u, slice %u points to CTU %u, slice %u\n",

mvx, mvy, iPartIdx, uiPartAddr, numParts, pcCU->getCtuRsAddr(), pcCU->getZorderIdxInCtu(),
pcCU->getSlice()->getSliceIdx(), ctuAddr, pcSym->getCtu(ctuAddr)->getSlice()->getSliceIdx());

}