Fix for msan crashes observed for mc streams

EVS 26.444 BE test passes.
pytests results: 588 failed, 381 skipped

MLD scores:
Original inputs:
MLD > 10: 116; Out of these, 51 cases are PLC
MLD > 5 : 112
MLD < 5 : 360

+10dB inputs:
MLD > 10: 310
MLD > 5 : 118
MLD < 5 : 160

-10dB inputs:
MLD > 10: 72
MLD > 5 : 68
MLD < 5 : 448