Content lost when switching editor context while editing.

I edit some text in wiki or wysiwyg mode. I can switch between these two modes without saving my document.
But when I switch to Objects, Class, Access Rights or History, the just edited text is lost and I have to start writing again.

This is somehow confusing because all these modes are grouped under "Choose editor" and therefore should behave the same.

It would be really helpful to at least display a warning message or even better behave the same as when switching between wiki and wysiwyg modes.