I’m posting this as a heads up/solution to any other devs searching for this issue - but I recently discovered that the GPU Lightmass Settings Actor (which, at least in a world partition level, is hidden from the outliner entirely) started spawning a phantom point light at my world origin. I had been using GPULM for quite a while, so I don’t know why this started happening suddenly. Doing a “Get Actor Of Class [GPU Lightmass Settings Actor]” > “Destroy Actor” on Begin Play seems to solve the issue. I have no clue how exactly to recreate it, but I thought I’d at least post it here for Epic see, and in case anyone else searches for it.