Iframe HTML 模式 bug

iframe block HTML模式好像有bug。 1.9版本

如果目标是嵌入

<iframe
src="http://localhost:3000/channel/general/?layout=embedded"
title="myframe">
</iframe>

url模式下,可以正常显示

<iframe 
allowfullscreen="" 
width="100%" 
style="position: relative; display: block; height: 1590px; margin-bottom: 24px; border: 0px;" 
src="http://localhost:3000/channel/general/?layout=embedded">
</iframe>

html模式下

<iframe 
allowfullscreen="" width="100%" 
style="position: relative; display: block; height: 1590px; margin-bottom: 24px; border: 0px;" 
src="data:text/html;charset=utf-8,%3Ciframe%0Asrc%3D%22http%3A%2F%2Flocalhost%3A3000%2Fchannel%2Fgeneral%2F%3Flayout%3Dembedded%22%0Atitle%3D%22myframe%22%0A%3E%3C%2Fiframe%3E">
</iframe>

HTML模式src应该是双层嵌套了,即便输入http://localhost:3000/channel/general/?layout=embedded 也不能正常显示

<iframe allowfullscreen="" width="100%" 
style="position: relative; display: block; height: 1590px; margin-bottom: 24px; border: 0px;" 
src="data:text/html;charset=utf-8,http%3A%2F%2Flocalhost%3A3000%2Fchannel%2Fgeneral%2F%3Flayout%3Dembedded"></iframe>