I can see you have a Signature stored and you have set your Profile to display it. That would seem to be enough. But I think there might be one other place to check. When you create a Post, scroll down and ensure the Miscellaneous Options has the "Show your signature" box checked. If not, check it and try another posting.
The issue here has to do with the post settings on the individual posts.
With your next post: click "go advanced" in the reply editor. Then scroll down and look for the setting to display your signature on the post. Some how this has been toggled off... change it and the sig should display when you submit the post.
. Wash your hands, flatten the curve - we can do this!