Hi, bug feedback for Mute reversing setting.
When "Mute Audio When Reversing" is OFF (meaning audio is mixed with reverse), you can't adjust audio mixing proportion.
You must enable "Mute Audio When Reversing" to be able to modify mix proportion.
This settings is reversed.
Normally, if the settings is OFF, you can adjust mix proportion, and turning ON disable ability to set mix, because audio is mute.
Regards