Steps to reproduce:

1. Open attached project
2. Switch to iOS
3. Set Graphics API to OpenGLES2 in Player Settings
4. Build 'Scene1 - CreateRT' scene to iOS
5. Build generated Xcode project to a device
6. Notice the render texture isn't working and the plane that the texture should be displayed on is simply black

Workaround: Changing the Render Texture size to a power of 2 (tried 1024x1024) solves the issue.

Note: With Metal Graphics API everything works as expected.