tertiary power assembling machine

[CyberWizard2261]

I made an extremely power hungry assembling machine and set it to tertiary power so it would work using only if the factory has enough energy for other processes

It works, it uses only excess energy from the factory, but when paired with accumulators some weird things happen:

The accumulators don't charge as if there was not enough energy for them, even when the assembling machine is idle and there is enough energy, the only way to make them charge is to remove the modded assembling machine

The electric network info shows an energy production as if the accumulators were charging and the energy consumption shows 0W

When I turn on the assembling machine it shows a reduced energy consumption as if it was sharing energy with the accumulators, energy consumption shows only the energy consumed by the assembling machine and energy production show a production bigger than consumption as if the accumulators were charging

I was not sure where to post this problem so decided to post it here if it's the wrong place plz change it