I hope you are correct jmckee.
I have been using plex on xbox one since it was released with zero issues. then bam this issue that a lot of people are struggling with. I have tried all 4 options in the post above none have worked for me. the only things I have not done was burn down my plex server and build a new one or factory reset the xbox. I am hoping to avoid these options as there is just a lot of configuration need to come back to normal
I also have the same type of issue on my samsungtv no one seams to be able to resolve that issue either. all the other devices such as sell phone and roku and other xbox’s seam to work fine still.