The core decoder in `ivas_core_dec_fx()` suffers from unnecessary back-and-forth scaling of buffers `output_32_fx[][]` and `save_hb_synth_32_fx[][]`. This incurs unnecessary complexity and stack memory usage and is responsible for a loss of precision. <!--- Below are labels that will be added but are not shown in description. This is a template to help fill them. Add further information to the first row and remove and add labels as necessary.-->