When I select a thread in Assistant, the conversation is shown scrolled to the top - that is, showing the first prompt I entered and the first response I got. Typically I actually want to see the latest prompt and response, be it an iterated script I've been working on, the convo has been updated with new info not in the first prompt, etc. Depending on the length of the thread it can be a little annoying to scroll down through it all.
Make / add a toggle that Assistant threads default to being "scrolled down" all the way to the bottom when selected.