Ah! But it's not only a display bug, because vegs aren't getting any energy.
Your right of course. Still fixed in 2.42.9.
BTW, here's the same sim at 20M cycles. The illusion of swaming is completely gone.
What's the record on most cycles in a mutation sim? Nothing too interesting to point out, but I do take some pride in how stable things are these days.
Note that this did not start out as a fast running zero-bot sim but rather used R_Fisannis as the starting organism. Bots now have almost 500 mutations after nearly 4000 generations.
Note also that it is part of a larger, multi-machine connected sim, so delete the teleporters if you want to run it.