Through Debugging, i have identified that the issue is coming from the following lines:

<!-- RequiredResourcesFooter -->
<script type="text/javascript" src="https://dl.episerver.net/13.2.2/epi-util/find.js"></script>
<script type="text/javascript">
if(FindApi){var api = new FindApi();api.setApplicationUrl('/');api.setServiceApiBaseUrl('/find_v2/');api.processEventFromCurrentUri();api.bindWindowEvents();api.bindAClickEvent();api.sendBufferedEvents();}
</script>
<!-- /RequiredResourcesFooter -->

These are rendenred on our master page via the below code:

<!-- RequiredResourcesFooter -->
<EPiServer:RequiredClientResources RenderingArea="Footer" ID="RequiredClientResources1" runat="server" />
<!-- /RequiredResourcesFooter -->

Is this a known EpiServer Bug? Are there any workarounds?

Hi,

We are also having this issue on our sites. Did you eventually find out what was causing the issue ?

thanks in advance!

This is happening to us too, thousands of times per day.

if(FindApi) is not a safe way to check if FindApi exists in the global scope. A safe if(typeof FindApi === 'function') would have prevented all of these errors.

One reason this is happening is that several content blockers block https://dl.episerver.net/13.2.5/epi-util/find.js and similar URLs.