The YouTube on X1 app doesn't keep the place you left off in a long video

Despite being signed into our YouTube account -- the X1 YouTube app more often then not does not keep the place in a video we left off. Frustrating with the longer 2,3 hour vids. 

Happens no matter the method of leaving the video - pausing first. Just hitting exit. Coming back and going to history often the red line just doesn't 'stick.'