Alexa doesn't update playback on Plex Media Server



Whenever I play something using Alexa Voice control on Plex, it plays the episode/movie perfectly but doesn't gets registered on Plex and after the movie/episode done playing it says it is watched but on the server side, it doesn't. It is still unwatched. Same goes if I go home on Plex and then recheck the episode/movie, it says it is still unwatched.

Example Scenario: Ask Plex to Play the Westworld. > Episode Kiksuya plays (the latest episode) > Check the server and nothing is playing on there.

Plex Version
Amazon Alexa on Android and on Echo.
Samsung UA40H5500
Roku Express