So I had 300 energy, and then I sold all my 4 relays, and thus I lost 15 energy and now I'm down to 285. I planned removing relays at exactly 300 for a specific reason, but now I see there's more time to be wasted to wait for the lost 15 energy without frigging relays.

I know it's not a bug fix but if you un-install the relays prior to selling them you won't lose any energy. You will lose some money tho.

Just as a clarification, by "lose some money", DMDMDM means that your modules will take some damage from being uninstalled, so when you sell them they will be worth slightly less. He doesn't mean you'll actually lose some money.