Have nothing to do with the ROM, has to do with going to page 3 of the HEC.
When i load the configuration on page 3 of the HEC appears a warning that can cause delayed on instant consumption, and I ignored. I think it is not only the immediate consumption, I also think that confuses autonomy and reserve warning light.
Have you solved your problem with instant consumption? I have similar problem, so I would welcome assistance with it.