If you display Japanese text on weex iOS, there will be a margin under the text.

I am creating an application with wex.
When I display Japanese text on iOS, there is a blank space under the text.
There is no problem with viewing on the web or Android.
If you look at the demo below on iOS weekx playground, you'll see a blank space under the text like a capture.
The underline will also be misaligned if you include both English and Japanese text (see Capture).

Demo:
http://dotwe.org/vue/8180c47f84522b0466e3e78d412283b0

Does anyone know the solution?