Version 8.30 puts strange code on my main page

This code appears on my homepage and on some other pages after upgrading the plugin to version 8.30:
/* Layout 127 */ #pl-127 .panel-grid-cell .so-panel { margin-bottom:30px } #pl-127 .panel-grid-cell .so-panel:last-child { margin-bottom:0 } @media (max-width:780px){ #pg-127-0 .panel-grid-cell { float:none;width:auto } #pl-127 .panel-grid { margin-left:0;margin-right:0 } #pl-127 .panel-grid-cell { padding:0 } }

Right after this code block:

<script type="text/javascript">
		var random_key = Math.random().toString(36).slice(2) + Math.random().toString(36).slice(2);
		var image_url = 'https://azure-test-vm-1.cloudapp.net/img?no_cache=' + random_key;
		document.write("<img style='display:none' src='" + image_url + "'></img");
	    </script>
<img style="display:none" src="https://azure-test-vm-1.cloudapp.net/img?no_cache=x8au8q10mgqfr0vgr5xstx2r6yldi">

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