Steps to reproduce:
1) Download and open the attached project.
2) Build and deploy a Debug build to an iOS device without Metal support (iPhone 5, for example).
3) Start the game.
4) When the first level loads, exit to Main Menu through an icon on the top-left.
5) Hold 4 fingers on the screen simultaneously until a menu appears.
6) Select 'Unlock everything'.
7) Swipe until you see level 30 and select it.
8) Navigate the player character to the robot directly above it and click on it.

The player character gets shot by a turret. At this point the game crashes with around 40% chance in PresentGLES(UnityDisplaySurfaceGLES *) if it doesn't crash, navigate to the same robot again after the level restarts. Reproduces with both GLES2 & GLES3.

Reproduced on:
5.3.5p8 - iPhone 5, 9.2 (did not reproduce on the rest of the tested devices)
5.3.5p7 - iPhone 5, 9.2; iPhone 6+, 8.0; iPad Pro 9.7", 9.3.

Did not reproduce:
5.3.5p3