I removed the limit (screen shot of metabox before removal) https://www.dropbox.com/s/4ywihsueg8nw74l/Screenshot%202016-10-30%2015.43.45.png?dl=0) from the textarea metabox and refreshed the post (did not reserve the post itself) and now all 1500 characters are being displayed (before is was omitting the last 5-60 characters).
Somehow limit is effecting the output of echo rwmb_meta( 'entry_narative');
For now, removing the limit is fine on this project as we are past the point of accepting submissions. Just hate to see it affect anyone else.
Thanks, always appreciate the fast replies and constant improvement in the plugins.