Help & troubleshooting for channels on your Roku device, including adding/removing channels, logging in to, authenticating, or activating a channel, channel-specific playback issues, assistance contacting channel publishers to report issues, and adjusting channel-specific settings.
2 PCs with the same win10 o/s, both accessing the same video files both have the same plex server both have the same Roku box One is fine, the other with the thumbnail issues.
The thumbnails: the library icons look normal but if I select a category, like tv, the thumbnails are nothing but an empty block. Clicking on the block brings up an episode where the thumbnail is just plain white. I can scroll and the episodes descriptions change and I can play them.
However, once in a while thumb nails are ok for one category.