HTML To PDF Conversion 2.1.6

Hi Everyone as I was working in a scenario for HTML To PDF Conversion 2.1.6 
Input  : Søren Mārtiņš İbra12m Núñez Guðrún Dvořák Śmita
Output : Søren M#rti#š #bra12m Núñez Guðrún Dvo#ák #mita


Before that for the charset I have fixed it in webApi 
headers: {
a!httpHeader(
name: "Content-Type",
value: "application/json; charset=utf-8"
)

and it has been fixed.

Now the issue happening after generating the PDF