switch the text format, the editor disappears

This is a known Issues, When you switch the format, the editor disappears, I have to find a solution, maybe not the best solution, but now it is valid

if you already download the ueditor libraries from http://ueditor.baidu.com/website/index.html, then you should be can find this file:
sites/all/libraries/ueditor/ueditor.all.js

open it with any text editor and remove this code (about line 29243 ~ 29246):

.....

if(holder.id){
 newDiv.id = holder.id;
 domUtils.removeAttributes(holder,'id');
}

.....

save it!

Done!