Conversion html to pdf with mistakes

[LLDmitry]

Hello
A couple mistakes on converting html->pdf:
I need convert msg files to pdf. As LibreOffice can't convert msg to pdf directly, i do pre-conversion msg-> html by another app. And AWS Lambda with LibreOffice converts this html to pdf.
Result pdf contains empty, extra first blank page and doesn't contain "From" email part. I've tried desktop LibreOffice app, it converts the same html correctly.
Could you please advise?