3D model partially disappears when tilted to certain angles in 3d view (revit families)

[sorenandu19]

Hi, I recently made an arc with a 1" pipe profile and whenever I tilt it to certain angles, the outer layer disappears and I could see some of the insides of the sweep. The file is attached below for your reference. Thanks in advance!!

[Simon_Weel]

Same here. If you switch the view to Shaded instead of Hidden Lines, it remains visible. Guess it's a bug...

[barthbradley]

Make the circle in the Profile Family with a Polygon. 

...before you go there, keep in mind that when Thin Lines is turned off, the edges of the 1/2" radius polygon in a project view will most likely be distinguishable.