I'm getting a white line appear in outlook 2013 and 2016 in the following markup, outlook 2010 and 2011 seem uneffected

https://litmus.com/builder/73e74e1

What's weird is that if I delete the dir="rtl" on the table cell then the white lines go away

The template originally started out as a litmus template

Does anyone know what's going on here and how to fix it?