Why am I losing power after I fire my weapons?

I've started playing Space Pirates and Zombies, and while I am enjoying it immensely, I've come across an issue that I am sure someone here would be able to shed some light on.

I have found that with one of my ships, once I fire my weapons, I do lose energy for the shot itself, which makes perfect sense, but then I lose even more energy after I've fired my weapons. Here is a video clip demonstrating the issue:

And here is the configuration of the ship in question:

The ship is equipped with a pair of small overload emitters:

I originally thought firing the weapons removes my cloak, so that the additional power draw is for reestablishing it, but after swapping it out for a shield the situation did not change.

So, what's up with this mysterious power draw?

Solution 1:

I tested this with shields instead of cloak, and I had the same result - my energy continued to drain after the emitters were finished firing. At first I thought that it was perhaps a bug, as switching to other weapon types doesn't yield this behavior.

Then I noticed that the small orange "glow" around the emitters was running in reverse when the second power drain occurred. This leads me to believe that perhaps the emitters take some energy to fire, and then some energy to recharge for the next shot.