Visual Editor Doesn't Work, Text Editor Does

Hello,

If I go into the visual editor and hit a button to apply the format the visual display of the text changes. However, if I hit the update or try to view the page all of the format has disappeared. This only happens with the visual editor, the text editor works as designed.

Any would be appreciated. Thank you.

https://ww.wp.xz.cn/plugins/visual-editor-custom-buttons/