Cross-references was invalid in PDF file

[sosoayaen]

example code

#Title1
some description of title1

#Title2
some bala...

It's needed a long long long long long long long content...

bala

bala

bala

bala

bala

bala

balla

##subTitle1
balabala

##subTitle2
balabala

#Title3
there is a cross-reference to [Title1](#title1)

I saved content as HTML file and PDF file with StackEdit.
it was correct in html file, but not worked for PDF file.
Maybe, this matter concerned with #294