The yellow bar hinting at extra energy is there, but there are no numbers, and doesn't seem to decrease even though the main energy bar is depleted.
EDIT: yellow bar went down after ore became a pod, then used up its energy. Whether pods are supposed to turn back into ore is the actual question now.
Pods turn back to their unbuilt state if they are hit by particles, for example. (doppel, emergent and mire seem to work too)
If you build a pod, don't use its energy and it's converted back to "ore", you can no longer use energy in this pod, it's energy value is subtracted from "yellow energy" numerical display, but the yellow bar doesn't go down to reflect this temporary energy loss.
Thank you for submitting this one.
It seems to be that the bar does not update on pod destruction, and that another surviving pod will still cause an update.