Hi MJEG,
We’re having the same issue. I have determined it only occurs (for us) when the post was scheduled in advance. If we manually publish a post then it does automatically send it to our fanpage. I was curious if you’re scheduling your posts as well. If that’s the case then I think we can narrow down the problem. I haven’t dug into the code yet, but I think if we can narrow down the circumstances when it occurs then it’ll make debugging the problem a little easier.
take care,
elgeeko