LTV crash fixes, crashes encountered with newly introduced changes

Pipeline results:

• EVS 26.444 BE test passes.
• decoder pytests:
  MLD scores:
  Original inputs: 562 failed, 374 skipped
  MLD > 10: 29
  MLD > 5 : 85
  MLD < 5 : 448
  +10dB inputs: 562 failed, 374 skipped
  MLD > 10: 143
  MLD > 5 : 194
  MLD < 5 : 225
  -10dB inputs: 562 failed, 374 skipped
  MLD > 10: 7
  MLD > 5 : 38
  MLD < 5 : 517
• encoder pytests results:
  MLD scores:
  Original inputs: 562 tests:
  MLD > 10: 18
  MLD > 5 : 71
  MLD < 5 : 473
  +10dB inputs: 562 tests:
  MLD > 10: 66
  MLD > 5 : 124
  MLD < 5 : 372
  -10dB inputs: 562 tests:
  MLD > 10: 5
  MLD > 5 : 30
  MLD < 5 : 527