Slow, slow, slooooowww ... well, what can you do. I'm glad that the site is working at all.
One trick is, when invited to leave the page, to leave the page. And then, without logging out, close altogether. ( Don't re-submit the post, like after 30 seconds or so, as this will result in double-posting ).
More often than not, the post was accepted and has landed, as I find out when I re-check back in. So, when it takes very long to get in via the front door, then chose a line from your computer memory, of previous history when you were connected, and go to your Profile, and from there back to the What's New category.
We have to be "smarter" than the computer, but it sure is patience taxing.