This is actually two problems.
1 when opening a page for the first time it is constantly downloading stuff which makes the page jump about and jump about again, and again and again.... for anything up to 30 seconds. I assume this is caused by ads.
2 when reading a page (I have the whole thread on one page) when it has finished loading and jumping about, and i have finally found where I last read to, or the bookmark has taken effect, I continue reading, scroll slowly down as I read and then there's suddenly that old "there was a problem loading this page so it was reloaded" message and Iam back to square one waiting for the damn thing to do its thing for up to 30 seconds.
Whatever is causing it is making MN unusable today. It's been almost every single thread.