Great to see the effort put in to fix the broken threads.
The site itself tries to embed the contents automatically when you post a link from what I understand. It's that automatic embedding of the contents that seems broken and completely locks the forums from loading for the web browser until you close and relaunch it. I had to create so many incognito windows and log in fresh to fix all those posts XD
But I may be wrong on the cause as I don't use social media personally and barely post on the site these days (always lurking though). Twitter links are just the common think I've had to manually embed to fix posts.