Not OP, but I have similar issues.
To clarify, certain mods that affect biters (and the sandbox mode <- start new game mode, not a mod) can result in a situation where there’s no Gleba base or units, causing a resource bottleneck since no eggs. Side note: no issues with demolishers or territories.
To give a very specific example of the issue I’m facing: the Total Combat Overhaul mod.
Link to the mod (I take no credit):
https://mods.factorio.com/mod/total-combat-overhaul
The idea is that mods like this can create situations where biters spawn on top of minable resource patches (with no way to turn it off), resulting in no Gleba enemies spawning, while fruit trees still do appear. It’s primarily a new chunk enemy generating issue.
For example:
If I don’t have this mod enabled, I can go until I encounter Gleba enemies, save, enable the mod, and reload with it active. Gleba enemies will still be there, and everything works fine initially. However, no matter how far I explore after that, no more Gleba enemies will spawn (Gleba fruit treens, Gleba Wet land, Vulcanus related: no issues).
Off-topic notes:
This mod is incompatible with the "Gleba Soil Anywhere" mod:
https://mods.factorio.com/mod/gleba-soil-anywhere
Please consider adding a 4th option for scrap—Holmium ore ONLY. Aka it'ss obtainable only through recycling. Since the other ores are already abundant, this would synergise well with the recycling infinite bonus while avoiding excess ore buildup.
Please add a warning (during the map generator) that Gleba water determines where Gleba enemies spawn. I had water turned off and couldn’t figure out why no Gleba enemies were appearing until I realised water needs to be enabled.
Lastly Thank you for this mod! Since before Space age DLC I was never a fan of the end game rocket. I love train, main reason why I play factorio. The space aspect highly ruins the train aspect since I need to create them separatly, while with this mod, I can finally have everythingin one place, without needing space. So again, thank you for this mod!