DirectX11 COM object with 0 references not released - com

Question

I'm trying to track down a "memory leak." However it's doesn't seem like a real memory leak since calling ReportLiveDeviceObjects reports that there are 0 references
D3D11 WARNING: Live ID3D11Texture2D at 0x00000140D3FE44F0, Refcount: 0, IntRef: 1 [ STATE_CREATION WARNING #425: LIVE_TEXTURE2D]
D3D11 WARNING: Live ID3D11RenderTargetView at 0x00000140D3FCBB60, Refcount: 0, IntRef: 0 [ STATE_CREATION WARNING #428: LIVE_RENDERTARGETVIEW]
D3D11 WARNING: Live ID3D11Texture2D at 0x00000140D3FE5BF0, Refcount: 0, IntRef: 1 [ STATE_CREATION WARNING #425: LIVE_TEXTURE2D]
D3D11 WARNING: Live ID3D11RenderTargetView at 0x00000140B8EDB000, Refcount: 0, IntRef: 0 [ STATE_CREATION WARNING #428: LIVE_RENDERTARGETVIEW]
As you can see, the ID3D11RenderTargetView objects have both 0 internal and external references. However it's still a live object. What could cause this to happen?
For clarity, I am using this through SharpDX, though that shouldn't affect the debug output from DirectX 11.
Corresponding issue:
https://github.com/sharpdx/SharpDX/issues/903

Answer 1

DirectX 11 uses 'deferred destruction' of resources, so typically if you need to force destruction you need to Flush. For example, in Direct3D game templates, you need to fully unbind and destroy the render targets before resizing:
// Remove any bound render target or depth/stencil buffer
ID3D11RenderTargetView* nullViews [] = { nullptr };
m_d3dContext->OMSetRenderTargets(_countof(nullViews), nullViews, nullptr);
// Destroy the views (which themselves hold the references to the resources)
m_renderTargetView.Reset();
m_depthStencilView.Reset();
// Flush the immediate context to force cleanup
m_d3dContext->Flush();