Stereo upmix not working after restart

Hello Friends!
I am using Odroid N2+ with CoreELEC 19.5 rc2
Everytime I restart Kodi i have to disable and enable again theh “Stereo Upmix” option in the audio settings to make it work correctly. If i dont disable / enable this option after restart th stereo sound comes only from two speakers on 5.1 configuriation.
I have Passthrough enabled on my system.