Decoder: High MLD for Stereo at 24.4 kbps to Mono
# Basic info
<!--- Add commit SHA used to reproduce -->
- Float reference:
- Encoder (float): dd0cceede1515e223b0e70cb3bf84389289bb396
- Fixed point:
- Decoder (fixed): 6835cac606d32cdb27f1fa671dcbb0946c2b5dda
# Bug description
The fixed point decoder exhibits a high MLD of 44.4 compared to the float output.
The fixed point output is saturated and clipped:
Float decoder output ( -8.27 LUFS):
{width=635 height=477}
Fixed decoder output ( -4.78 LUFS):
{width=635 height=477}
This is possibly related to #1793.
# Ways to reproduce
Box folder: [...\Box_EXTERNAL_IVAS_BASOP_VERIFICATION\issues\issue-1947](https://dolby.box.com/s/ujvynhk72q2eih7yob9zis014ua8kisg)
<!-- Commandline or script -->
```bash
sox -D am1aa1s12_48.wav am1aa1s12_48.10dB.wav gain 10
./IVAS_cod_flt_ref -stereo -max_band FB 24400 48 am1aa1s12_48.10dB.wav bit
./IVAS_dec_flt_ref mono 32 bit ref.wav
./IVAS_dec_fx mono 32 bit cut.wav
```
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issue