[Otherlands] Valrei mobs outside of incursion point

Hi all,

I have a deed (Safe Heaven, ironic I know) on the island just North of the incursion point. I logged in today to find a son of nogump on the island, tried to run away which didn't work very well considering that I am on an island and ended up being killed by a rift warmaster.

Right now I am in Irkalla, with no way to go back since my ships are on the island. I would like to know if this is a bug or an intended feature; in that case I might have to move somewhere else. I thought the island would have been safe given that is outside of the incursion zone.

Here is a screenshot if it helps: imgur.com/a/FQvRH

Update: I made it back to the island, a player was kind enough to come kill the Son of Nogump, but the Warmaster is just too strong. I ended up logging off with my bed since the hulking thing is on the outskirts of the island, I can carefully sneak out to my knarr when I log back I think but I can't really do anything within my deed right now.