Introduce unique, toggleable styles in the Styles plugin · Issue #14206 · ckeditor/ckeditor5 📝 Provide a description of the new feature The Styles feature currently works in such a way that a user can apply multiple classes/styles to an element, i.e. it's possible to add more that one styl...

Please vote for this #CKEditor5 feature: github.com/ckeditor/cke...
As for upgrading #TYPO3 instances to #v12, this is really necessary to keep the previous behaviour of #CKEditor4 that only one #style can be assigned to an element instead of multiple. #CKEditor