Using classic Plex and rarflix - ok except all the episode display the same icon

Using classic Plex and rarflix on Roku. Everything is working fine except the episode icons are all the same.
Picture for TV show is as selected, the season(s) icons are all different as they always have been, but push down to the episodes and instead of a scene from the episode they all display the same tv icon.
Note that on my PC the displayed episodes are as they should be.
Any correction ideas appreciated