data-align="center" does not work

Changes are made on on 11.x (our main development branch) first, and are then back ported as needed according to our policies.

i am not able to reproduce the issue.
Can you please update this issue with more detailed steps to reproduce and screenshots.

1. I Click on the IMCE button (fig. 1).
2. I Select the image (fig. 2).
3. I Select "align center" (fig. 3).
4. Check the source code (fig. 4).
5. I Save.
6. The image is aligned to the left (fig. 5).

Is data-align="center" present in the rendered page markup? Which theme are you using?

I use the Solo theme, but I've always had this problem with other themes and other versions of Drupal.
https://prova.gmpe.it/prove

Would you please answer both of my questions?

Sorry, but I don't understand English well and I have to use Google translate.
1. I answered: I use the Solo theme https://www.drupal.org/project/solo →
2. I'm not very experienced and I don't know what to look at. the test page is this: https://prova.gmpe.it/prove

Thanks and best regards

Look at the page source to see the HTML. Anyway class="text-align-center" is on images so I think this is more to do with themes than with CKEditor or with that web site's text filters configurations.

In the page source there is class="align-center" and "align-right": center does not work, right works.

I will try to contact the theme author, but I don't think this is the problem because it occurs with all the themes I use.
I usually align images in another way, but this problem is related to this other one: https://www.drupal.org/project/drupal/issues/3489646 🐛 CKEditor 5 moves some classes in the a tag Active

One or the other must be solved, unless a Drupal version of Colorbox-inline arrives.

Thanks and best regards

The author of the Solo theme, provided me with some css to add to my custom theme.
Now it works perfectly.

Kind regards