The MicroVision is setting all/most of the levels on the console to 47 without the user setting anything. The Grandmaster will pull the levels down to 0 (zero) but no matter what will go back to 47 even with no show loaded.
The MicroVision FX has "Analog Readbacks" turned on with no analog dimmers attached.
This can be found and turned off by.
<Setup><9> for Options
<Enter><3> for Analog Readbacks
<Enter><4> to Disable <Enter>
Now when you press <Stage> to go back to the channel levels, everything should be back to normal.