Abyssal demon not respawning

[Tom Bombadil]

I have killed a fair amount of abyssal demons, enough to craft majority of the best armour and weapons for two people. Last time I killed it, it had a bugged spawn in Fractured Plains. After that i havent found the demon again and it has been a week since I last killed it. I have looked all over the map to find it without avail.

[Rose Brigade]

That's not a bugged spawn. It can respawn in several places, not just the Swamps. It spawns commonly in the Swamps though.

One bugged spawn I found though was it stuck in a tree in one of the swamps. Just look around every few in-game days, sometimes it respawns after a long period of not showing up, and it may be stuck somewhere