"Posts -> All" view kinda jumping around like crazy?

I'm a newbie to Lemmy, so apologies if this is a known issue of I am doing something wrong. But I find that when I browse by "Posts -> All", my feed just kinda... jumps around all over the place.

It's like a responsive web application, where the page contents are rearranged as the browser loads additional resources after the initial page load. I start scrolling, and the posts that I'm shown are changing and re-ordering and basically popcorning to the point where I really can't even browse.

I'm using Brave with all the default privacy shields, if third-party cookie or tracker blocking might have anything to do with (given Lemmy's origins, I would be amazed if that were the issue). Is there a known issue with the currently installed version of the Lemmy software on this instance, or might I somehow be doing something wrong?