Problems with AppleTV Photos App

I have an AppleTV Gen 3 with tvOS 26.1 and an LG TV. I am having trouble with the Photos app. If the photo was taken with my phone, it appears normal on the TV. If it's been processed through Lightroom, some (but not all) photos appear cut off, in 3 sections, or with green horizontal lines through the image. The app starts to stutter and shake, and a column appears on the right side of the images with partial, shaking images. The photos I'm having trouble with are .jpg files. The same images appear fine on the Photos app of my iPhone 16 and on my Mac mini, and appear fine when mirroring my iPhone to the AppleTV. Any ideas are appreciated.