Adding a Content Editor, Content Link causes other Web Part titles to be truncated on the left.

I'm using an on-premise SharePoint 2013 service. I've added a new Content Editor web part and then I specify a Content Link. Once I've don't that, all other Web Part and Pop-up window titles have about 10 characters on the left side of the title truncated. Is there any workaround for this? For example, the Web Part title bar should read Issues, but it only shows ues.