[platform-ui-dev] Is a bug or other strange stuff

["向秦贤" <fyaoxy@xxxxxxxxx>]

Hi,
Found this stuff, not sure that why.
please see 2 pictures.
In plugin develop wizard, 
drag and drop, select some text, if scroller no offset, it's ok.
if scroller offset bottom, it's not ok.
there are some mirror like thing.

Someone interest it?

Regards,

qinxian

Attachment: test1.PNG
Description: PNG image

Attachment: test2.PNG
Description: PNG image