Imported OBJ dissappearing when mat previs enabled

Project:YafaRay
Component:Blender Exporter
Category:bug report
Priority:normal
Assigned:Unassigned
Status:active
Description

Hi there

I import OBJ AGISOFT meshes into Blender to render them with YafaRay. However, if I have material previsualisation enabled in material panels, the mesh dissapears in the 3D viewport when selected. This does not happen when material preview window is rolled back up. Bug tested in Windows 64bits builds of Blender 2.79b / YafaRay 330

Thank you in advance for your help !

File:

https://drive.google.com/open?id=195Myk4fYAfnQvCNpr4KsHKZtRhQZcDur