How to reproduce:
1. Open given Unity project
2. Open Frame Debug
3. Enter Play Mode
-- Notice only 2 draw meshes in Frame Debug
4. Disable "Camera batches" game object and enable "Camera"
-- Notice 4 draw meshes in Frame Debug

Expected result: Both objects images should be drawn the same
Actual result: Images are drawn with different amount of drawn meshes

Reproducible with: 2018.2.0a6, 2018.1.0b12, 2017.4.0f1, 2017.3.2f1,2017.2.2p2, 2017.1.3p2, 5.6.5p3

Notes:
The only one difference I can notice is that in "Camera" gameobject images are duplicated from one panel to another one, while in "Camerabatches" image is duplicated in the same panel only sprite is changed. However, when I have opened frame debugger, these both game objects act differently. When "Camera" is enabled you can see 4 mesh renders and these 4 images are drawn separately, while "Canerabatches" has 2 different meshes and it draws images by 2.