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When I move the squad and the energy goes below the level where you get a notification from a char about low energy, the energy gets consumed but the move ment does not start, wasting the energy. This is especially bad with long distance move commands when it can waste a hundread or two of energy, possibly cousing plenty of harm.
I also have a suspicion that interrupting a long move also does not refund the unsued energy for steps that were canceled, but I used it only once or twice.