Thanks .... saw that at https://helpx.adobe.com/experience-manager/6-5/sites/developing/using/reference-materials/granite-ui/api/jcr_root/libs/granite/ui/docs/changelogs.html

Have you tried the multifields as nested node store ? Or inspecting the web browser AJAX calls during RTE edit ?

Are you able to see the empy directories above GloberSemiBold.woff2 font file ? Is the woff2 font type allowed in your dispatcher rules ? On other clients, we had to add some of these font file types to the dispatcher ALLOW rules.