Stereo encoder @ 32kbps, different mode decision moves speaker location

Basic info

• Float reference:
  • Encoder (float): b63c033f (Thu Apr 3 13:16:24)
  • Decoder (float): b63c033f (Thu Apr 3 13:16:24)
• Fixed point:
  • Encoder (fixed): 291c48d3 (Thu Apr 17 09:45:10)

Bug description

At 1:27.25 - 1:28.31 the BASOP encoder sounds different, likely due to a different stereo mode decision. The result is that the speaker moves position.

BASOP

Float

Ways to reproduce

Box folder: ...\Box_EXTERNAL_IVAS_BASOP_VERIFICATION\issues\issue-1570

IVAS_cod_ref.exe -max_band SWB -stereo 32000 48 20ms_aligned_files_concatenated.wav ref.192
IVAS_dec_ref.exe STEREO        48 ref.192 ref.wav

IVAS_cod.exe -max_band SWB -stereo 32000 48 20ms_aligned_files_concatenated.wav cut.192
IVAS_dec_ref.exe STEREO        48 cut.192 cut.wav