Let's say player A starts first and player B stars second. If player A does electrical damage to player B, player B starts with less energy. But now, if player B does electrical damage to player A, the turn ends for both players and player A restores energy and will begin turn with full energy. Obviously, first player has advantage over electrical fights.

Solution: energy should be restored for a player when that player ends his turn.

Energy is restored to you at the end of YOUR turn. I believe you may be looking at this backwards.

No, it is as I said, I noticed this after many battles. Currently, energy is restored for first player when a cycle is finished (when both players finish their moves), but because of being first player A has advantage over player B.

Normally, after player B reduces energy to 0 to player A, player A shouldn't start with restored energy and be able to use energy weapons / drone against player B.

EDIT: It seems it has been fixed, thank you!