Hi oxyd, Thanks for your check, i looked at my save again but the issue persists. The problem i see is that all biters and nests that are out of range, which is just a few chunks, become completely unresponsive to pollution. Nests will still absorb it, but they will not spawn new biters and no biter...

Hello, wanted to report the same problem. Problem: I build a medium size factory in 26 hours in a unmodded game with map tweaks to resources and biter expansion time. At some point all biters and spawners on the visible map went from working as normal, to frozen in place. Spawners that are absorbing...