Undefined offset: 3 in …\jetpack\sync\class.jetpack-sync-module-posts.php

I just started seeing this error though Im not sure how long its been around. It seems to only appear once every several refreshes which is why I didn’t originally notice it.

Also, it’s appearing below the footer of my theme leading me to believe it’s something that’s loaded later (like way after plugins_loaded ).

The fact that it’s intermittent as well as it’s placement leads me to believe it has something to do with footer scripts? I’m just guessing though. Any help would be appreciated.