Yes you are correct. Let me explain how this worked before, why it was removed, and how you can fix it:
How it worked before
Before X3 0.22, we had a "fix" in place for CONTENT, so that if there was a SINGLE paragraph <p>, it would be centered. If there was MORE than one paragraph <p>, text would be LEFT aligned. This was really just a "hack", because we figured it looked nice with text aligned to center if there is only a little text, although by default, text should
always be aligned to LEFT for readability.
Why was it removed in X3 0.22?
The fix was removed in X3 0.22 simply because this fix was too random, and it shouldn't be imposed upon default content layout. What if there is only one long paragraph? It should be left-aligned for readability.
How to manually center-align:
If you want to align something (anything) to center, use this basic html:
<p class="text-center">Any text goes here</p>
Or:
<div class="text-center">Use a div tag if your custom content includes images or more than just text</div>
* Unfortunately, you cannot use markdown tags inside html tags. You would need to continue to use html.
We would like to add an editor button for align, but it is a bit complicated because markdown does not support any align tags. We will be looking into this for a future release.