Here are the test on my end. When Nauvis Enemy = "enemy", "mixed race", "2way splits" or "mixed race", they don't spawn. even when I force "rso-vanilla-biter-generation" = true and "rso-biter-generation" = false.
I see that there are multiple issues from RSO's data-final-fixes.lua.
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This block "for _, planet in pairs(data.raw.planet) do" set all my custom propertyExpression to 0 on nauvis, this breaks my custom spawn solutions for "2 ways split" and "4 ways split" and "mixed race"
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The following limits "rso-vanilla-biter-generation" to only work with bobenemies. So ERM biters' probabilities are set to 0, even when I forced "rso-vanilla-biter-generation" to true.
"if not settings.startup["rso-vanilla-biter-generation"].value and not mods["bobenemies"] then"
- It breaks my new minerals on Planet Char and Planet Aiur as well. "for _, resource in pairs(data.raw.resource) do" block is likely the cause.