When rendering from two threads, validation layers report the command pool as being used from multiple threads at the same time.
Dec 28 13:00:59.518 ERROR gfx_backend_vulkan:
VALIDATION [UNASSIGNED-Threading-MultipleThreads (0)] : THREADING ERROR : object of type VkCommandPool is simultaneously used in thread 0x2a64 and thread 0x19a4
object info: (type: COMMAND_POOL, hndl: 87)
When rendering from two threads, validation layers report the command pool as being used from multiple threads at the same time.