Xbox One Not showing as Cast Device

Can anyone help, i can see plex web\chromecast\rasplex on my network but always assume xbox didnt work. I have just realised that it should have been there for the past year or so. Can someone give me some ideas of what the issue might be?

tested from android app, ios app and chrome web.

Yeah I just noticed this too. Seems like at one point they allowed casting to it, but an update to the app a few months back broke it, or removed it. Would certainly be nice to have feature parity with the PS4 and other platforms.

Its still classed as supported and many others are using it ok so think it should be avaliable.

https://support.plex.tv/hc/en-us/articles/203082707-Supported-Plex-Companion-Apps

For some reason it seems like I have to play a movie from the Xbox and then the casting is available. I know that then the casting is pointless but thought it may help point us in the right direction.

People of Plex, any idea when this will come back to my Plex on Xbox One? Make the recent Amazon Echo news much less exciting if my xbox one wont show up as a player.

thanks