Split Summary at cursor

Hello,

I know that the functionality should be disabled when using the tinymce editor.

But why is the split button functionality disabled when not even have the role to use TinyMCE? Is their some setting I missed? The problem is that a lot of users don't have rights to use TinyMCE, but can't use the split anymore. For the time being I have disabled the module.

I hope someone has a solution for this.

TIA,
Fossie