No Follow Pan on stéréo Main to stéréo Matrix

Hi,

I send the Main stéréo fader in 2 stéréo matrix faders (Full range and sub-bass separate)
When I turn the Main stéréo Pan/balance knob, there are no effect on the sending stéréo matrix.
Same thing with or without follow pan actived or not on the routing page…
That’s ok whith the pan/balance matrix outputs.

Is it a bug ?

Thanks.