Composure confusion

Need some Composure assistance.
My simple Composure stack has 2 custom Layer elements. BP_CgCaptureComponent and a BP_NcamDistortionMap.
I’ve also added a Player Viewport Compositing Output pass in my Comp Outputs so I can see the results in PIE mode.

Works as expected. 3 questions.

Why do my Layer Elements become deactivated (eye icon hidden) when entering PIE mode?

Why when selecting a layer element in PIE mode does it say ‘Suspended’ in the viewport?
and

Why when selecting a layer element in PIE mode does my performance drop dramatically?

Thanks for any feedback!