Biters attack the big Power poles, even if the setting is set to make them invulnerable.

I guess this is related to another mod.
And so, in any Rampant, everything that was built before the invulnerability was set is the target of attacks. But after destruction, it is replaced by an immortal analogue

not a single mod that i use has an effect on powerpoles though, can't explain it.
here the list of active mods:
https://ibb.co/5gWPrLh6

and it spawns crystals sometimes, which can't be mined, very weird
https://ibb.co/mCSjV5Kf

These crystals belong to the enemy. Of course, you can't mine them. Only destroy them with some effort. This is how it was intended, since the original Rampant

oh okay.. but still, the powerpole setting doesn't work :/