I died on a solo mission just now, with only 1 ME in my tank. I decided to revive myself, so I quickly went to the energy market, bought some energy at the market price, closed the window, and revived while my CE meter was still flashing.
After the battle, I looked at my energy meter and found that I had a full 100 CE, and 0 ME.
I only needed 5 to revive, so I didn't gain much, but other players with steeper revive costs might be cheating hundreds of CE out of this bug.
but actually the ce is substracted, it just isn't shown
you'll see it the next time you use ce, like reviving yourself again or going dow the elevator