Cars normally have two accessory device power lines providing continuous power in run or in run and accessory, but drop off during "start". These lines intentionally interrupt heater, wiper, radio, and other things during start.
Be sure you are on the true engine 12V power line that is normally common to fuel pump and ignition when on run and start.
As for the wideband....my Innovate reset below a certain battery voltage. When my battery would go below 9-10V it would reset. I never measured the exact voltage, but I had it on the engine run line (that had power start and run) and it would occasionally reset in cranking.
Try pulling the starter wire off the starter and seeing if the Innovate resets on start without the battery being loaded. Maybe you have it wired wrong. Otherwise, you might have to power it from a temporary battery.
To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
89 LX. 363, single turbo, Super Vic EFI, TFS high port heads by TEA, solid roller, glide. Holley HP EFI. (exact combo varies)