Repro:
- download this small project (Party.zip)
- Make sure the Main scene is in the build settings and that Vulkan is set as the rendering API
- build player for Desktop, Win64 standalone
- Run the executable, make sure the scene renders and then press the Windows Key (or do anything that takes the renderer out of focus)
- notice the crash

Reproduces on: 2020.2.sf1, 2020.2.3f1
Does not reproduce on: 2020.2.1f1 2021.1.0b4, 2019.4.18f1

stack treace:
========== OUTPUTTING STACK TRACE ==================
0x00007FF8EE785F40 (amdvlk64) vk_icdGetInstanceProcAddrSG
0x00007FF8EE7AEDD1 (amdvlk64) vk_icdGetInstanceProcAddrSG
0x00007FF8EE7AE8C5 (amdvlk64) vk_icdGetInstanceProcAddrSG
0x00007FF8EE83005D (amdvlk64) vk_icdGetInstanceProcAddrSG
0x00007FF8EE7B5D07 (amdvlk64) vk_icdGetInstanceProcAddrSG
0x00007FF8EE53EE1D (amdvlk64) vk_icdNegotiateLoaderICDInterfaceVersion
0x00007FF8EE53E60E (amdvlk64) vk_icdNegotiateLoaderICDInterfaceVersion
0x00007FF8EE54288A (amdvlk64) vk_icdNegotiateLoaderICDInterfaceVersion
0x00007FF6E2DC2B91 (Unity) vk::PipelineBarrierMap::Submit
0x00007FF6E2DCA526 (Unity) vk::CommandBuffer::FlushBarriers
0x00007FF6E2DC6591 (Unity) vk::CommandBuffer::ClearColor
0x00007FF6E2D953DE (Unity) vk::Image::Clear
0x00007FF6E2DC82D5 (Unity) vk::RenderSurface::CreateColorSurfaceImpl
0x00007FF6E2DC8484 (Unity) vk::RenderSurface::CreateColorSurfacePlatform
0x00007FF6E2D98594 (Unity) GfxDeviceVK::CreateColorRenderSurfacePlatform
0x00007FF6E617B918 (Unity) GfxDeviceWorker::RunCommand
0x00007FF6E618832C (Unity) GfxDeviceWorker::RunExt
0x00007FF6E6188878 (Unity) GfxDeviceWorker::RunGfxDeviceWorker
0x00007FF6E3BF6135 (Unity) Thread::RunThreadWrapper
0x00007FF96EDF7C24 (KERNEL32) BaseThreadInitThunk
0x00007FF96F40D4D1 (ntdll) RtlUserThreadStart
========== END OF STACKTRACE ===========
A crash has been intercepted by the crash handler. For call stack and other details, see the latest crash report generated in: C:/Users/CATALI~1/AppData/Local/Temp/Unity/Editor/Crashes
Stack trace:
0x00007ff626454bce (Unity) vk::ImageManager::RemoveTextureIDBinding
0x00007ff6263fff3e (Unity) vk::Image::~Image
0x00007ff626402084 (Unity) vk::Image::`vector deleting destructor'
0x00007ff626405df3 (Unity) vk::ResourceDestructionStagingArea::Clear
0x00007ff6263ff666 (Unity) GfxDeviceVK::~GfxDeviceVK
0x00007ff626402004 (Unity) GfxDeviceVK::`vector deleting destructor'
0x00007ff62739849c (Unity) DestroyRealGfxDevice
0x00007ff6297f4956 (Unity) GfxDeviceWorker::~GfxDeviceWorker
0x00007ff6297f4ab4 (Unity) GfxDeviceWorker::`vector deleting destructor'
0x00007ff6263884a8 (Unity) GfxDeviceClient::~GfxDeviceClient
0x00007ff626388844 (Unity) GfxDeviceClient::`vector deleting destructor'
0x00007ff6273983d6 (Unity) DestroyGfxDevice
0x00007ff628ab878e (Unity) WinMain
0x00007ff62a91e3c6 (Unity) __scrt_common_main_seh
0x00007ff96edf7c24 (KERNEL32) BaseThreadInitThunk
0x00007ff96f40d4d1 (ntdll) RtlUserThreadStart