'Sometimes' when I click on a post, and then try to scroll downward to see all the responses, there's a point when the page freezes and the rest of the responses are not available to be seen. And many times the page freezes in the middle of a non-specific post - could be any post.
This does not always happen, and I have had the same computer for years.
I was having the same problem as Pettles. I switched from "Classic" view to "List" view and solved it by using that format for viewing posts under each topic. Only had the problem viewing DD movie pages. Hope that helps.
Click the "List" word in purple at the top of page and see if that helps.