The character is the sentence ending character in Benagli, character code &#x964. The PDF is created using Shonar Bangla font. The error occurs in the footer of the document. The first occurrence is shown as a question mark with a diamond outline, right after the text "Healthwise, Incorporated". The second occurrence is correctly displayed as a vertical bar, immediately before the text "2023-02-abk5167".

1. abk5167.html‎ 16.3 kB ‎
   Source html file
2. abk5167.pdf‎ 163.8 kB ‎
   Generated PDF

The two elements have different font-family settings:

div#DocumentFooterCopyright span.CopyrightText {
        font-family: "Times New Roman";
        font-size: 12pt;
}

div#DocumentFooterCopyright span.CopyrightDisclaimer {
        font-family: 'Times New Roman', 'Bangla';
        font-size: 12pt;
}

That fixed it for me, thank you so much!