It seems to me (at least when using Apple Safari) that the "Center" option of the integrated image is always ignored when creating the topic: I always have to re-edit the final saved result and re-select "Center".
- Open a new topic
- Add an image in the text from the "Image" icon in the toolbar
- Click on the added image to use its central button "Edit"
- Switch the "Position" parameter from "None" to "Center"
- The image appears now centered: perfect!
But after posting your topic, my image is no longer centered.
=> I have to redo the centering action to get the correct result.
Is there a solution?