Originally posted by Shaken_Widow:

not a bug, progression tracks to new worlds.

even though you didn't kill the elder on that world, the game recognizes that you were part of a world that had, and therefore have the ability to reach the next biome which makes those attacks happen.

this is why you don't bring a whelp to your friends server unless you're planning on making it your base server, only bring your chads over for parties.

Thats not at all how that works.

Since the release of EA, have used multiple world saves outside of my main progression world for resource gathering and not once had anything beyond the boars and necks attacking in any of them. Having boss items like the wishbone for example, doesn't trigger any raids.
It's what you do in that world that effects the raids for that world.

Your characters gear or what it has done in another world has no bearing.