tl dr
Crafted biter nests of quality become common if not fed and revert to being normal biter nests, and are then recaptured. Only tested with a rocket turret shooting the capture bot rocket.full story
I crafted some captive biter spawners and was fortunate enough to get some of quality (2 uncommon nests to be precise).According to the factoriopedia, they should craft faster at higher qualities, which is a desirable trait.
My issue occurred when my Gleba supply ship got delayed a bit too long and my uncommon captive nests became normal biter nests. I then had 2 uncommon 'wild' biter nests. Since I was off planet at the time, I had my logistic bots place down a rocket turret and load it with capture bots, and was promptly confused/disappointed when I watched the uncommon wild nests become common captive nests.
Other random information that I think is probably irrelevant:
- Both turret and capture rocket were of common quality.
- The game had been running for many hours without being closed when I discovered this. (I did not close the game, reopen it, and test in an editor world. I'd like to think that this doesn't matter though)
- The crafting stats (number of eggs the nest produce) got reset (which makes sense to me).
Thanks as always for all your hard work on the game! Greatly enjoying it!