Drop-down list images are missing in the PDF output - Robohelp version 2020.6.76

The drop down list images in the project do not appear in the pdf output when I use the "Print" condition tag. But the images appear if I use the "Online" condition tag. 

For eg: <p>The <a class="dropspot" data-condition="Others:Online" data-rhwidget="DropSpot" data-target="POPUP467191772" href="#">Sign In</a></span><span data-condition="Others:Print">Sign In</span> page appears. </p>
<div data-targetname="POPUP467191772">
<p class="img"><img alt="" src="assets/images/Authentication_Sign_in.png" /></p>
</div>

I need online and print condition tags because I want HTML and PDF outputs 

I use RoboHelp version 2020.6.76 and Adobe Reader Touch version 3.1. 

Does anyone have s solution to this problem or why is it happening?