Night raids literally spawn next to my bed??

There I am again another night interrupted by cannibals and horrors beyond comprehension bypassing hundreds of defences, walls and traps by just spawning next to my bed ughh argh 😤 is there any way to fix this?

My base is a circle with 30 meter diameter + outter circle with 100 meter diameter, both walls strong as the great wall of China and trapped like 1960s Vietnam. All worked fine till they started to teleport right next to my bed.