Hyperlink in Sharepoint list opens in two new tabs

We have a list (new list experience) with customers that we have developed a Dashboard page for.

This page gathers information on the customer using an Id from a querystring that is generated by a workflow when an item is created in the customerlist. Meaning we build a link in the workflow that is stored in a hyperlink field.

The problem is, when we click on this link (in the list column) it opens the Dashboardpage in two new tabs in Chrome and in IE it opens in a new tab and tries to open it in a new window as well.

Our url looks something like /SitePages/Dashboard?Customer=57.

I've checked the workflow and that seems correct, if we add the link manually, the same thing still happens.

Has someone else experienced this? Seems like a bug, so if anyone has any ideas I'd be very happy.