Steps to reproduce:

1) Download attached project and open in Unity
2) Make sure that Vulkan is the only Graphics API in the Player Settings
3) Build and Run project on a device

Error message in the logcat:
12-04 14:04:06.787 23449 23530 D Unity : Vulkan error VK_ERROR_DEVICE_LOST (-4) file: ./Runtime/GfxDevice/vulkan/VKTaskExecutor.cpp, line: 1269
12-04 14:04:06.787 23449 23530 D Unity : Vulkan error./Runtime/GfxDevice/vulkan/VKTaskExecutor.cpp:1269
12-04 14:04:06.928 23449 23530 D Unity : #00 0xc7582498 0xc7582498 (libunity.so) vk::TaskExecutor::DoFlushInternal(unsigned long long, unsigned long long, unsigned long long) 0x420
12-04 14:04:06.928 23449 23530 D Unity : #01 0xc7580eb0 0xc7580eb0 (libunity.so) vk::TaskExecutor::Flush(unsigned long long) 0xb8
12-04 14:04:06.928 23449 23530 D Unity : #02 0xc755ee54 0xc755ee54 (libunity.so) GfxDeviceVK::FinishRenderingOutsideRenderPass() 0x78
12-04 14:04:06.928 23449 23530 D Unity : #03 0xc755f550 0xc755f550 (libunity.so) GfxDeviceVK::ReadbackImage(ImageReference&, int, int, int, int, int, int) 0x5f8
12-04 14:04:06.928 23449 23530 D Unity : #04 0xc6db2604 0xc6db2604 (libunity.so) GenerateEnvironmentData(int, float*) 0x5c4
12-04 14:04:06.928 23449 23530 D Unity : #05 0xc6dc2334 0xc6dc2334 (libunity.so) EnlightenRuntimeManager::UpdateEnvironmentLighting() 0xf8
12-04 14:04:06.928 23449 23530 D Unity : #06 0xc6dc2968 0xc6dc2968 (libunity.so) EnlightenRuntimeManager::Update() 0x358
12-04 14:04:06.928 23449 23530 D Unity : #07 0xc6dbadb4 0xc6dbadb4 (libunity.so) EnlightenRuntimeManager::InitializeClass(void*)::PostLateUpdateEnlightenRuntimeUpdateRegistrator::Forward() 0x30
12-04 14:04:06.928 23449 23530 D Unity : #08 0xc71cc838 0xc71cc838 (libunity.so) ExecutePlayerLoop(NativePlayerLoopSystem*) 0x60
12-04 14:04:06.928 23449 23530 D Unity : #09 0xc71cc890 0xc71cc890 (libunity.so) ExecutePlayerLoop(NativePlayerLoopSystem*) 0xb8
12-04 14:04:06.928 23449 23530 D Unity : #10 0xc71ccaa4 0xc71ccaa4 (libunity.so) PlayerLoop() 0x11c
12-04 14:04:06.928 23449 23530 D Unity : #11 0xc7492b48 0xc7492b48 (libunity.so) UnityPlayerLoop() 0x22c

Reproduced with:
2018.3.0f2, 2019.1.0a12

Devices under testing:
Reproduced with:
VLNQA00175 Samsung Galaxy Note9, OS:8.1.0, CPU:arm64-v8a, GPU:Mali-G72 (Vulkan version:1.0.66)

Not reproduced with:
VLNQA00152 HUAWEI EVA L19*, OS:7.0, CPU:arm64-v8a, GPU:Mali-T880 (Vulkan version: 1.0.11)
VLNQA00216 Razer Phone 2*, OS:8.1.0, CPU:arm64-v8a, GPU:Adreno (TM) 630 (Vulkan version: 1.0.66)

Not reproducible with Gles3