When creating resources, the allocator will add the D3D12_RESOURCE_FLAG_USE_TIGHT_ALIGNMENT flag.
Resources specifying a 64kb swizzle layout cannot use this flag, GetResourceAllocationInfo reports the following validation error;
D3D12 ERROR: ID3D12Device::GetResourceAllocationInfo: D3D12_RESOURCE_DESC::Flag D3D12_RESOURCE_FLAG_USE_TIGHT_ALIGNMENT is not valid when the layout is either D3D12_TEXTURE_LAYOUT_64KB_STANDARD_SWIZZLE or D3D12_TEXTURE_LAYOUT_64KB_UNDEFINED_SWIZZLE (current layout is D3D12_TEXTURE_LAYOUT_64KB_UNDEFINED_SWIZZLE). [ STATE_CREATION ERROR #599: CREATERESOURCE_INVALIDMISCFLAGS]