FX Encoder: Wrong bandwidth behaviour for OMASA 3 objects at 48 kbps with characterization items
# Basic info
<!--- Add commit SHA used to reproduce-->
- Float reference: 7d06ba093b47d5b10261669625fc253db94ac523
- Fixed point: 50f46e9d487823be6b25911e0863e778a7ee9b7c
# Bug description
In one of the P800-19 (OMASA 2TC, 3-4 Objects) outputs from the concatenated files, the bandwidth extension behaves different between float and (full-chain) fx codec. The difference is audible and at least puzzling if not annyoing. This is happening for 48 kbps with decoding to BINAURAL.
Float ref (condition c21):

Fx (condition c30):

Category c12 which is float enc -\> fx dec does not have this, so it is either an encoder problem or an interaction thing.
# Ways to reproduce
Box folder: tbd
```
./IVAS_cod -ism_masa 3 2 cat2_concatenated.wav.0.csv cat2_concatenated.wav.1.csv cat2_concatenated.wav.2.csv cat2_concatenated.wav.met 48000 48 cat2_concatenated.wav bit
./IVAS_dec BINAURAL 48 bit out.wav
```
<!--Commandline or script-->
```bash
```
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issue