On July 6 on Server 5 of Pokemon Survival, we had several ppl from Server 1 come on and try to fight something i believe they spawned. During their conversation, they all of the sudden were stating they couldn't hit whatever they spawned, as it was on claimed land. When they left, it resulted in an overwhelming amount of monsters spawning (even in well-lit areas). The result was the loss of 3 villagers my husband and I had finally gotten to the point of hearts around each other. They were enclosed in our claim. I can not show you the conversation, as I didn't screenshot. I can provide names of the players if you needed.
There is no monster spawn eggs that players have access to so no one could of spawned monsters on your land. The monsters must of been spawned naturally so there isn't anything we can do about it.