See this post here on how I fixed this in my setup…
This binding uses the image item in a more aggressive way than other bindings, as well as the amount of RAM that is used and requires garbage clean up is also very high. Possibly there are settings for garbage collection that could be tweaked, have not looked into this yet as I do not see the error since the post above. Recently I have been setting up a new Odroid C2 server because it has more RAM than a PI2 so I have been rebooting daily whilst getting it setup, but I’ll leave it running for a week to see what happens. Can you provide any more information on how you are using the setup? Are you running the picture on multiple tablets that are displaying 100% of the time? Anything in the logs?