My wideband gauge has been acting up lately and after rewiring the whole thing to no avail, I shall inquire within before potentially exploring other wideband options. For reference, it is wired into the premade harness provided with my MS3X by Braineack ™

Upon turning the key and starting the car, it goes through two separate heating cycles, once for ign on and once for crank/start. Is there any way around this or is it inherent of the gauge? I'd like to be able to see my afr's on start for diagnostic purposes.
Also, random E9 codes. I can't seem to trigger it, but it will throw a low voltage code for <1 second then will do a normal startup cycle while driving. Sometimes it stays on E9 until I turn the ignition off, then on again. This doesn't happen often, but is a nuisance.

 

Is it possible you have it wired to accessory rather than switching power?

On Accessory power it will switch on at key position 2 but then turn off while cranking. This can cause sensors to fail and pop errors I am told. Does that explain yours heating twice?
(I recently wired in one to accessory power and was scolded for it Have consequently kept the sensor out of the car til I redo it!)