Your example makes sense to me too. But for a topic where I have to scroll to read the full post, it is confusing. How do I know that it is missing because the post is “short” and there is no reply?
The first information for me is the number of replies. There are also two buttons. At some topics I have to scroll to use the buttons at the end and at other topics they are below the timeline. If there is no reason to put them there, you could always scroll down to reach them.
My first post here was also to short, but the timeline easily fits next to it
For me the blank space at the right indicates something is missing. Maybe the post notice and the text should not leave space for the timeline, when it does not show? Then it would not seem something is missing. (But I think the wrench is shown on all topics, so for some users the space is used)
Good point
I’ve tested it on a large screen. For sure you are not going to have the same behavior on a tablet or small screen. I did not think about it.
I agree with you.
EDIT: I think it would be a safe bet to show the timeline as soon as the post height goes beyond the timeline height + some margin. So ~450/500px maybe.
On a related note there’s a tooltip popup as well explaining the timeline feature, but it sometimes shows on the welcome topic when there’s no replies. And thus there’s no timeline.