Cross Domain Tracking in Google Analytics can break with this plugin

I have cross domain tracking set up in google analytics between two domains. The session data is preserved via a _ga cookie URL parameter that’s passed in the link from the source domain to the target domain. However, I noticed the URL parameter is stripped in the target URL with this plug-in enabled.

When I put the target URL in the list of domains to ignore for the external links plugin settings, the cross domain tracking seems to be working again.

So warning to those doing cross domain tracking – put your target domain in the ignore list.