if they die close to the platform they make non replacable nauvise grass tiles that you cant put platforms on

Have not been able to replicate. Are you using latest version of Factorio? If so, could you provide a save?

tried a few times to make a few test saves but by the time i get a platform up the ships destroy it, but i do have screenshots

https://cdn.discordapp.com/attachments/1195078978227155125/1464709577252536352/20260124134811_1.jpg?ex=69767498&is=69752318&hm=094700a856c014adb4893a8748fdcc9744cc3a7c07b9eaa01eb85fa5cf735d0b&

https://cdn.discordapp.com/attachments/1195078978227155125/1464709584542372105/20260124134812_1.jpg?ex=69767499&is=69752319&hm=fbc1a53fc667c9541e13f1b73482fadd1930c0e8edfbcd10761de9442885b9f9&

i checked log outputs for any info but your mod doesnt give any, but it places just one of those tiles per enemy death, i think it might have to do with the destroyed objects?
im also on the latest version yes, 2.0.73

Are you using any other mods? Does disabling them remove the issue? Maybe it's a conflict.

found it, sorry for the delay, its terrain evolution 2
only happens when thats installed

more specifically the "hi rpley" map setting which has a poor descriptor, its suupposed to replace world tiles with better foliage ones on enemy death but i guess has no filter for space, ill go report it to them instead