when you happen to scroll really fast really long (e.g. by using the wheel unlocking of a Logitech mouse, you can end up in a 429, which is reasonable. However ideally the error should be caught and a retry thrown in, depending on how long it takes also show something to the user.
also maybe a manual pagination option could be helpful when someone wants to look for something that is older so they can roughly home in on the date rather than needing to scroll back for months or years one page at a time.
maybe you guys have a CDN or whatever (or a newer version of discourse) which can deal with quick stuff better. And try doesnt even have a remotely long enough list.
I was not meaning within a topic, but rather (as seen in the shot above) the list of topics.