Does anyone else get a problem where walls don;t stop aliens when this mod is enabled ? They just seem to walk straight through them.

I found another hit which says this only happens if Combat Mechanics Overhaul is installed. Something about Collision Layers.

When Natural Evolution Buildings and Combat Mechanics Overhaul are used together, the Layer-13 causes the problem
Layer-13 is in data-updates in line 105
What is Layer 13 for and is it even needed?

Written with Deepl

I edited it and change the layer.. that fixes the problem :)