Hi. Thanks for keeping this mod alive, I love the extra challenge it provides over the vanilla biters. I think I've encountered a problem with how the mod is working with the Lignumis mod (https://mods.factorio.com/mod/lignumis). I've played with both mods for a while without any issues. However, after the 10 August update, I'm suddenly getting biters on Lignumis that break the balance and are nearly impossible to kill with the low damage defenses available on Lignumis. To my knowledge, Lignumis isn't supposed to have biters, only the moded pentapods. My guess is Rampant is some how overriding the Lignumis mod and causing the biters to spawn. Not sure if there's anything that can be done but figured I'd mention it here just in case.

In this case, I will need your save.

Here a link to my save. This save is 2-3 minutes before a large biter attach in the north west that leads to a good portion of the base being destroyed.

https://drive.google.com/file/d/1aRPXpukvilxcorzFIZ5D1uBFcIVBqOhP/view?usp=sharing

Great. I downloaded the save, I'll try to watch it this week.

I have a similar problem with the mod "Fulgoran enemies" on fulgora, some biters spawned and now they have nests everywhere

Thank you both. The error is fixed
My fixes will not affect the error when, due to the standard expansion of modded biters a standard nest appears - for example, Frost Biters on Aquilo
As for your situation, the standard nests no longer appear. You will have to delete existing nests either through the editor or using the console command.

The update is likely to be released tomorrow