Hello ,
Thank you for posting in the community and there does seem like there is an issue I can reproduce on my end with displaying PT media but not sure if it's identical to what you are experiencing. Would you be able to submit a bug by using the link: https://twinmotionhelp.epicgames.com/s/case-community-page
Path Tracer media images are not rendered with Path Tracer as the Presentation is a Real-time (Raster Engine) mode. If you need PT quality then I recommend using the Panorama Set.
Kind regards,
Vincent B.