I have a site where i display a TCPDF generated file in an Iframe. But when i try to download the PDF in the iframe overlay it downloads the tcpdf php file instead.

If i display the pdf file without the iframe (in a new tab for example) its working.

I`m using Google Chrome Verson 99.0.4844.51

Does anyone knows why this happens and how to fix this?

    <form id="moodleform" target="iframe" method="post" action="tcpdf-test.php">
            <input type="hidden" name="testid" value="test"/>
        </form>
        <iframe name="iframe" align="center" width="100%" height="1200px"></iframe>