I have been looking at the code that is triggering the page auto-post feature to automatically disable. The error seems to be 190 (according to a hard-coded try/catch in fb-social-publisher.php)
I do not know why this is having problems staying activated. It will work for a window of time (roughly two hours), and then API will give a problem and it will stop attempting to post to the page.
The error is listed as "Invalid OAuth 2.0 Access Token"
The end result is that my access token is expiring within hours (rather than weeks).
This error/behavior is originating from fb-social-publisher.php line 265-269. The $status_messages array is not filling with diagnostic data, so there is no diagnostic data to be used.
Anyone else seeing these problems? Has anyone else solved this issue effectively?