### Basic info - Commit SHA: 607235da (HEAD of main) ### Bug description [Link to code](lib_dec/ivas_dirac_output_synthesis_dec.c#L1099-1101) In the function `ivas_dirac_dec_output_synthesis_process_subframe_psd_ls()` the diffuseness is used for smoothing the direction and accessed using the current `hDirAC->readIdx`. `hDirAC->readIdx` here points to the next subframe at this point, the comment is correct for MASA or DirAC only. For SBA with combined DirAC/SPAR processing and especially with decoder side DirAC parameter estimation this points to the diffuseness 6 subframes before the current one in the worst case (bands with decoder side parameter estimation). Although there is heavy smoothing done on the diffuseness it is in this case still the wrong one. ### Ways to reproduce <!--- 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. -->