Material displaying white when exporting with alpha layer.

Hello! New to unreal, but I can’t seem to find a solution to this anywhere. I have an emissive material applied to a cylinder, as well as a niagra effect, that seems to be exporting wrong when I use deferred rendering and checking accumulator includes alpha. It seems to export correctly when I am not exporting with an alpha. I have tried both PNG and EXR, and different emissive materials, but still end up with the same issue.