WL PRO 10.50 - Speaker Configuration does not work

After installing the WaveLab PRO 10.50 update, I cannot configure the Speaker Connection for the second and third pair of speakers.
Better said - it can be configured, but only the first pair of speakers is heard. After returning to the old version (10.40) everything works properly

https://www.steinberg.net/forums/viewtopic.php?f=297&t=203970