Using drag & drop spams native errors at a very high rate

[kmgallahan]

Describe the bug

As per the title, using drag & drop causes this error to get spammed 10+ times per second:

onecoreuap\shell\dataexchange\winrt\lib\droptargetinternal.cpp(306)\DataExchange.dll!63A1634D: (caller: 75B20E08) ReturnHr(170) tid(575c) 80070490 Element not found.

With callstack:

DataExchange.dll!DropTargetInternal::DragUIOverride::AttachContent(unsigned __int64,struct tagSIZE *,struct tagPOINT *,struct IInspectable * *)	Unknown
rpcrt4.dll!_Invoke@12()	Unknown
rpcrt4.dll!NdrStubCall2Heap(void *,void *,struct _RPC_MESSAGE *,unsigned long *)	Unknown
rpcrt4.dll!_NdrStubCall2@16()	Unknown
combase.dll!763a1482()	Unknown
[Frames below may be incorrect and/or missing, no symbols loaded for combase.dll]	
rpcrt4.dll!CStdStubBuffer_Invoke()	Unknown
combase.dll!763a1252()	Unknown
combase.dll!763a0d26()	Unknown
rpcrt4.dll!NdrCStdStubBuffer_Release()	Unknown
rpcrt4.dll!CStdStubBuffer_AddRef()	Unknown

Steps to reproduce the bug

Debug this project: https://github.com/kmgallahan/GridViewDragDropTest

or

1. Create a WinUI 3 project
2. Turn on native debugging and update packages
3. Add a GridView with source and enable drag & drop for it
4. Debug
5. Use drag & drop and observe output

Expected behavior

A peaceful Output window

Screenshots

No response

NuGet package version

WinUI 3 - Windows App SDK 1.4.0: 1.4.230822000

Windows version

Windows 10 (21H2): Build 19044

Additional context

This happens with all drag & drop operations, not just the GridView.

[StevoSM]

I am also seeing this issue using a Grid element. Note that Drag and Drop work fine with other elements.