Hi!
I'm playing around with the latest 2.8 version and found a "weird" problem when i changed the camera to Orthographic: My object disappeared.
Turns out the orthographic camera is reversed in the Z-axis (pointing in the +Z direction) (see screenshots)
ETA: After some more playing around it looks like it's more than just "backwards", the camera also seems offset
(The camera is above the object, but the rendered view is from below [and the "Clip Start/End" is offset..]).