T.Fujita

The same issue having here with Pro, if I enter today in a date field and update the post, the date is saved as yesterday. And then update again, it becomes two days before today.
Probably it was introduced after the 7.3 release.

The Advanced Rich Text plugin simply adds a <span> tag with styles.
If we copy and paste the styled text, Gutenberg gets rid of all the span tags. This temporal workaround doesn’t fix the structural deficiency underling the new editor at all.

We know TinyMCE is out of date, so we are seriously struggling and trying to make use of the defective editor.

It is not sorted out but looks like thre is no solution for this.

Thanks for reply.

Hi,

Are you talking about the categories that are listed in the Document section when editing a post?

Exactly.

Looks like there are some plugin to achieve this for classic editor by changing the check boxes into a dropdown list or radio buttons.

https://www.wpbeginner.com/plugins/how-to-enforce-one-category-per-post-in-wordpress/

Now I limit this by jQuery like this

      var cat_checklist = $('.categorychecklist input[type=checkbox]');
      cat_checklist.click( function() {
        $(this).parents('.categorychecklist').find('input[type=checkbox]').attr('checked', false);
        $(this).attr('checked', true);
      });