That seems to have fixed it. Sorting by new I was able to get back to posts I had already seen. I was not able to to that previously. Thanks

Occurs every time I use summit if I scroll far enough. It actually isn’t that far, maybe a couple hundred posts but that’s a rough guess. Doesn’t matter what account, instance or sort I use, eventually I hit the 400 Bad Request. Has a retry button but no matter how many times you click retry it won’t load more posts. I’m using the current non-beta version on Android.