Empires get stuck in loop trying to settle corrupted biome

I spawned humans on a savannah island between two other islands, a grassland island and a corrupted island. Now after filling out the savannah island, the AI is stuck in a loop of trying to settle the corrupted island and instantly getting slaughtered by the ghosts. Once the colonists are slaughtered, the empire immediatly sends the next boat of settlers to immediatly be slaughtered again, slowly growing the ghost population. They do not try to settle the grassland island, they are just stuck in an endless loop of sending ships to the corrupted biome to immediatly be slaughtered. The only way for the AI to break out of this would be to stop trying to settle the corrupted biome after losing a couple settlers OR send an organized invasion force to kill all the ghosts.