Embraers with HUD switch to a special "upset recovery" mode on the HUD outside certain pitch/roll parameters. I do think tat removes the FD as well but am not completely sure. Helpful for recovery and necessary, as the simple green horizon line would be either stuck to the top or bottom and without a color difference between "up" and "down" wouldn't give a clear indication where "up" is when banked steeply.
Pilots should be able to look "through" the FD and use brown/blue, sky pointer and the red chevrons as a cue where to roll/pitch to recover.