have some wired characters( �� ) appear after send pdf stream to react frontend

[soarying]

wkhtmltopdf version(s) affected: x.y.z

OS information
win10 pro

Description
I have a peculiar problem after I update my client-side react app to the most recent version.
the pdf cannot be opened and there are some weird characters had been added to my file almost everywhere, and I have no problem doing this call on Postman, and before I update my npm libraries.

How to reproduce
if (response) {
const file = new Blob([response], {
type: "application/pdf;charset=utf8",
});
const fileURL = URL.createObjectURL(file);
window.open(fileURL);
}
Expected behavior

it should have a pdf report like my old version.

but I got this :

and I can tell these wired characters are everywhere:

Possible Solution

please Help