I have had these sam

 I have had these same issues…   what I find works for me is to select the “stay” button, then “re-post” using the “leave page” and the post seems to work. Of course, as a measure of backup, I select and copy my response before choosing to attempt the post (that way I don’t have to re-type everything if it doesn’t post properly. So far, this method has worked everytime.