formula error in web clipping

[wieniawski-lai]

hi,

I am using

• firefox on win10
• markdownload v3.2.1 to clip a webpage

https://zhuanlan.zhihu.com/p/522285332

The internal formula is not all correct

设 $\overrightarrow{a}=\left( x_{1},y_{1}\right) ;\overrightarrow{b}=\left( x_{2},y_{2}\right)$\\overrightarrow{a}=\\left( x\_{1},y\_{1}\\right) ;\\overrightarrow{b}=\\left( x\_{2},y\_{2}\\right)

As show above, the later of the formula lacks '$' to quart. So it appears like

Would you pls take a look at this?

thx.

[wujcan]

I have the same problem. Any solution?