MONO Group problem!!

I’m on Mac, Cubase 10 (tried with 9.5, same issue):
I have a Movie Stereo Audio Track with dialogs on the Right Channel and Music on the Left Channel.
To hear them separately on both the Channels I used to create a Mono Group in which the Audio Track got routed.
Working with the Pan of the stereo Audio Track, I was able to select Dialogs or Music.
Actually, doing all this, panning the audio Track, I only can hear the Left Channel !!
Any suggestion??

Thanks

Funny I reported the same in 2015,

https://www.steinberg.net/forums/viewtopic.php?f=226&t=80904

I wonder, wether the bug was never looked at or is back again now …

And so did I, in 2015!
Back Again