Why the master panner is post dithering?

We put our dithering plugins in the 7~8 slot of the master bus(post fader), and we don’t want anything after the dithering…
Then why the panner of the master bus is post slot 7~8?
I found out about this when I was panning the master bus to the hard left, and I opened the iZotope Ozone 6, both the LR meters were recieving signals. So the panner must be “post slot 7~8”.

My way around this is to bypass the panner on the master bus, but I don’t know if that helps. Is there anyway to move the panner to “pre slot 7~8”?