I have several Roku devices or TVs that are working fine without this issue. On a my sharp Roku TV, my amazon Prime app loads fine, but boxes are empty on all screens. If I select a program it will play.
all other apps working fine.
I have one TCL Roku TV that will occasionally have the same issue. Prime Video will open with no thumbnails for shows. I think it is just a memory resource issue. I normally do a SETTINGS -- SYSTEM -- POWER - SYSTEM RESTART -- RESTART and let the TV and Roku reboot and then Prime Video will open and display the thumbnails.
I have one TCL Roku TV that will occasionally have the same issue. Prime Video will open with no thumbnails for shows. I think it is just a memory resource issue. I normally do a SETTINGS -- SYSTEM -- POWER - SYSTEM RESTART -- RESTART and let the TV and Roku reboot and then Prime Video will open and display the thumbnails.