Broken strikethrough highlight when starts from the beginning of the line

[sadid]

Here is the code

## How to produce

Here is a normal text with correct ~~strikethrough text~~.


~~But when it starts from begining of the line it fails.~~ 

and Also makes follwoing text highlights broken. 

## Even the subtitles.

and here is the result:

[jingchangshi]

Same bug for me.