godot: GLES2 crash with errors 502/506 on iOS [iPhone 5s, 6 and iPad Pro]

Godot version: 3.1 (tested beta 7 through beta 9)

OS/device including version: iPhone 5s - iOS 11.4

Issue description: Simple 2D projects crash instantly right after the launch image is shown. Screen turns dark grey. Does not occur when exporting as a GLES3 project.

XCode output:

2019-03-01 18:15:27.556089+0100 GLES2_TEST[295:13172] [DYMTLInitPlatform] platform initialization successful
*********** main.m
running app main
after init super 0x102bd0450
******** screen size 640, 1136
after init gles 0x102bd0450
******** adding observer for sound routing changes
******** adding observer for keyboard show/hide
glview is 0x102bd0450
Path: /var/containers/Bundle/Application/7DF1E009-FFCA-4227-B882-763032EF57A2/GLES2_TEST.app
godot_iphone /var/containers/Bundle/Application/7DF1E009-FFCA-4227-B882-763032EF57A2/GLES2_TEST.app/GLES2_TEST
cwd /private/var/containers/Bundle/Application/7DF1E009-FFCA-4227-B882-763032EF57A2/GLES2_TEST.app
os created
setting data dir to /var/mobile/Containers/Data/Application/CF445435-3FD3-4F46-89FC-A286B2707960/Documents from /var/mobile/Containers/Data/Application/CF445435-3FD3-4F46-89FC-A286B2707960/Documents
setup 0
cadisaplylink: 1start animation!
******** screen size 640, 1136
2019-03-01 18:15:28.211989+0100 GLES2_TEST[295:12957] [App] UIWindow->__registeredPreCommitHandler was abandoned !!!! this would have caused a cascade of blown fences - proactively clearing but a bug exists here somewhere between UIKit and CoreAnimation
2019-03-01 18:15:28.212285+0100 GLES2_TEST[295:12957] +[CATransaction synchronize] called within transaction
2019-03-01 18:15:28.218528+0100 GLES2_TEST[295:12957] +[CATransaction synchronize] called within transaction
2019-03-01 18:15:28.263400+0100 GLES2_TEST[295:12957] +[CATransaction synchronize] called within transaction
2019-03-01 18:15:28.322041+0100 GLES2_TEST[295:12957] OpenGL ES 2.0 Renderer: Apple A7 GPU
OpenGL ES 2.0 Renderer: Apple A7 GPU
2019-03-01 18:15:28.370377+0100 GLES2_TEST[295:12957] **ERROR**: Directional shadow framebuffer status invalid
2019-03-01 18:15:28.370805+0100 GLES2_TEST[295:12957]    At: drivers/gles2/rasterizer_scene_gles2.cpp:3330:initialize() - Directional shadow framebuffer status invalid
**ERROR**: Directional shadow framebuffer status invalid
   At: drivers/gles2/rasterizer_scene_gles2.cpp:3330:initialize() - Directional shadow framebuffer status invalid
2019-03-01 18:15:28.539121+0100 GLES2_TEST[295:12957] [MC] System group container for systemgroup.com.apple.configurationprofiles path is /private/var/containers/Shared/SystemGroup/systemgroup.com.apple.configurationprofiles
2019-03-01 18:15:28.539908+0100 GLES2_TEST[295:12957] [MC] Reading from public effective user settings.
2019-03-01 18:15:29.165566+0100 GLES2_TEST[295:12957] 502 error
2019-03-01 18:15:29.203475+0100 GLES2_TEST[295:12957] **WARNING**: Could not create framebuffer!!
2019-03-01 18:15:29.203574+0100 GLES2_TEST[295:12957]    At: drivers/gles2/rasterizer_storage_gles2.cpp:4333:_render_target_allocate() - Could not create framebuffer!!
**WARNING**: Could not create framebuffer!!
   At: drivers/gles2/rasterizer_storage_gles2.cpp:4333:_render_target_allocate() - Could not create framebuffer!!
2019-03-01 18:15:29.231660+0100 GLES2_TEST[295:12957] 502 error

AGXGLDriver`___lldb_unnamed_symbol544$$AGXGLDriver:
    0x1a5906ac8 <+0>:  orr    w8, wzr, #0x1
    0x1a5906acc <+4>:  mov    w9, #0xbeef
    0x1a5906ad0 <+8>:  movk   w9, #0xdead, lsl #16
->  0x1a5906ad4 <+12>: str    w9, [x8]
    0x1a5906ad8 <+16>: ret    

The second one is marked ‘Thread 1: EXC_BAD_ACCESS (code=1, address=0x1)’ where the arrow is (see screenshot).

Steps to reproduce: Make a new GLES2 project -> add Node2D -> export for iOS -> run on device

Minimal reproduction project: GLES2_TEST.zip (Included basic Images.xcassets with valid images to replace the xcassets Godot generates)

XCode screenshot: