### Basic info - Commit SHA: f05c5d80df1014918c0bb18ef0844a2596f92512 - Platform: all ### Bug description When switching from another MC mode to ParamUpmix in VoIP/Variable Speed Decoding, the ParamUpmix interpolator is not initialized and the TC handle buffer is not reconfigured properly. ### Ways to reproduce Run: ``` .\IVAS_cod.exe -mc 7_1_4 .\scripts\switchPaths\sw_mctech_5fr.bin 48 .\scripts\testv\stv714MC48c.wav bit .\scripts\tools\Win32\networkSimulator_g192.exe .\scripts\dly_error_profiles\dly_error_profile_0.dat bit bit_nws bit_trace 1 0 .\IVAS_dec.exe -voip HOA3 48 bit_nws dec.wav ``` <!--- 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. -->