SWB_BWE energy is sometimes too low

Basic info

• Float reference:
  • Encoder (float): 73d5e7cd
  • Decoder (float):
• Fixed point:
  • Encoder (fixed): c602cc48
  • Decoder (fixed):

Bug description

At least at low bit rate, the energy of the SWB_BWE on top of GSC is too low as shown in the figure below.

Ways to reproduce

Box folder: ...\Box_EXTERNAL_IVAS_BASOP_VERIFICATION\issues\issue-1329

IVAS_cod -stereo  13200  48 C:\Temp\dp03a4s03.wav bit