major overshoot in BWE of the MDCT stereo at 64 kbps

Basic info

• Float reference:
  • Encoder (float): fbeb5ef8
  • Decoder (float): fbeb5ef8
• Fixed point:
  • Encoder (fixed): 78cb4903
  • Decoder (fixed):

Bug description

Right and left channel suffer from major energy burst

Ways to reproduce

Box folder: ...\Box_EXTERNAL_IVAS_BASOP_VERIFICATION\issues\issue-1203

IVAS_cod -stereo 64000 48 dp03a4s04.wav bit
IVAS_dec STEREO 48 bit synfxfx.wav 

IVAS_cod_flt -stereo 64000 48 dp03a4s04.wav bit
IVAS_dec_flt STEREO 48 bit synfltflt.wav