DX12 Crash on load font

[EmptyKeys]

Hi, I'm testing DX12(11.0) render with my game, but having exception with loading fonts. DX11 platform works fine. Any idea what's the problem?

Object reference not set to an instance of an object.

at SharpDX.Direct3D12.Resource.GetDescription() at SiliconStudio.Xenko.Graphics.GraphicsDevice.AllocateUploadBuffer(Int32 size, Resource& resource, Int32& offset, Int32 alignment) at SiliconStudio.Xenko.Graphics.Texture.InitializeFromImpl(DataBox[] dataBoxes) at SiliconStudio.Xenko.Graphics.Texture.InitializeFrom(Texture parentTexture, TextureDescription description, TextureViewDescription viewDescription, DataBox[] textureDatas) at SiliconStudio.Xenko.Graphics.Data.TextureContentSerializer.Serialize(ArchiveMode mode, SerializationStream stream, Texture texture, Boolean allowContentStreaming) at SiliconStudio.Core.Serialization.Contents.ContentManager.DeserializeObject(Queue`1 serializeOperations, Reference parentReference, String url, Type objType, Object obj, ContentManagerLoaderSettings settings)