Remote Freezes while viewing movies utilizing Plex



Whenever I view movies on my Panasonic plasma utilizing my NAS (TS-451A) as the media player using the Plex App, I am loosing remote control function and unable to navigate in the app at all. It is fine when I go to my desktop or if I am on the home screen of my NAS on the TV, I am able to plug in a mouse to the NAS and use that on the TV to navigate and get to the Plex App but once I go into Plex I cannot utilize the mouse, the app just freezes. Any remedies for this.