Alexa and fire stick



I have just started using Alexa with a fire stick and used a couple of time with my Roku 3.

I am having an issue when I ask for anything to be played, when I do ask and the player is running but not logged in whatever I have asked for will still play and Alexa will say "there has been an issue and the Plex team will be notified"

I don't mind it playing without my logging in but it means my kids who have their own users will be able to play 18 rated movies or programs if even by accident where when they login it is restricted on their accounts.