Having two active cameras with a attached OnRenderImage() and setting their depthTextureMode with DepthTextureMode.Depth will result on a final inverted image.

Steps to reproduce:
1) Open the latest attached project.
2) Build scene 'Test' for iOS.
3) Run on a device.
4) When the app launches, tap the screen.

DepthTextureMode.Depth flag is toggled with each tap. When the flag is enabled, the whole view gets flipped upside down. This doesn't occur on the Editor and with other Graphics APIs.

Reproduced on:
5.4.1f1, 5.3.6p4, 5.2.4f1