Drag + Drop to boxes not working in blank gen 3 save

[ICanSnake]

When I open up PKHeX and set it to a blank gen 3 Sapphire save file, I tried to import some pk3's I have just to view some info. When you drag it to the left side where the Pokemon information is, the pk3 drops successfully. But when I try to set it to a spot in the box, or if I drag it directly to the box, this error message pops up:

Spoiler

Exception Details:
System.IndexOutOfRangeException: Index was outside the bounds of the array.
   at PKHeX.Core.FlagUtil.SetFlag(Byte[] arr, Int32 offset, Int32 bitIndex, Boolean value)
   at PKHeX.Core.SAV3.SetCaught(Int32 species, Boolean caught)
   at PKHeX.Core.SAV3.SetDex(PKM pkm)
   at PKHeX.Core.SaveFile.SetBoxSlot(PKM pkm, Byte[] data, Int32 offset, PKMImportSetting trade, PKMImportSetting dex)
   at PKHeX.Core.SlotInfoBox.WriteTo(SaveFile sav, PKM pkm, PKMImportSetting setting)
   at PKHeX.Core.SlotEditor`1.WriteSlot(ISlotInfo slot, PKM pkm, SlotTouchType type)
   at PKHeX.Core.SlotEditor`1.Set(ISlotInfo slot, PKM pkm)
   at PKHeX.WinForms.Controls.ContextMenuSAV.ClickSet(Object sender, EventArgs e)
   at System.Windows.Forms.ToolStripItem.RaiseEvent(Object key, EventArgs e)
   at System.Windows.Forms.ToolStripMenuItem.OnClick(EventArgs e)
   at System.Windows.Forms.ToolStripItem.HandleClick(EventArgs e)
   at System.Windows.Forms.ToolStripItem.HandleMouseUp(MouseEventArgs e)
   at System.Windows.Forms.ToolStrip.OnMouseUp(MouseEventArgs mea)
   at System.Windows.Forms.ToolStripDropDown.OnMouseUp(MouseEventArgs mea)
   at System.Windows.Forms.Control.WmMouseUp(Message& m, MouseButtons button, Int32 clicks)
   at System.Windows.Forms.Control.WndProc(Message& m)
   at System.Windows.Forms.ToolStrip.WndProc(Message& m)
   at System.Windows.Forms.ToolStripDropDown.WndProc(Message& m)
   at System.Windows.Forms.NativeWindow.Callback(IntPtr hWnd, Int32 msg, IntPtr wparam, IntPtr lparam)

Loaded Assemblies:
--------------------
mscorlib, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089
C:\Windows\Microsoft.NET\Framework64\v4.0.30319\mscorlib.dll

PKHeX, Version=19.11.25.0, Culture=neutral, PublicKeyToken=null
C:\Users\icans\Desktop\PKHeX\PKHeX.exe

System, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089
C:\WINDOWS\Microsoft.Net\assembly\GAC_MSIL\System\v4.0_4.0.0.0__b77a5c561934e089\System.dll

System.Windows.Forms, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089
C:\WINDOWS\Microsoft.Net\assembly\GAC_MSIL\System.Windows.Forms\v4.0_4.0.0.0__b77a5c561934e089\System.Windows.Forms.dll

System.Drawing, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a
C:\WINDOWS\Microsoft.Net\assembly\GAC_MSIL\System.Drawing\v4.0_4.0.0.0__b03f5f7f11d50a3a\System.Drawing.dll

PKHeX.Core, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null

System.Core, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089
C:\WINDOWS\Microsoft.Net\assembly\GAC_MSIL\System.Core\v4.0_4.0.0.0__b77a5c561934e089\System.Core.dll

System.Configuration, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a
C:\WINDOWS\Microsoft.Net\assembly\GAC_MSIL\System.Configuration\v4.0_4.0.0.0__b03f5f7f11d50a3a\System.Configuration.dll

System.Xml, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089
C:\WINDOWS\Microsoft.Net\assembly\GAC_MSIL\System.Xml\v4.0_4.0.0.0__b77a5c561934e089\System.Xml.dll

Accessibility, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a
C:\WINDOWS\Microsoft.Net\assembly\GAC_MSIL\Accessibility\v4.0_4.0.0.0__b03f5f7f11d50a3a\Accessibility.dll

PKHeX.Drawing, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null

--------------------
User Message:
An unhandled exception has occurred.
You can continue running PKHeX, but please report this error.
 

Spoiler

Dragging into boxes works fine when you load an existing save file though:

Spoiler

 

[Kaphotics]

ty fixed in latest commit

https://github.com/kwsch/PKHeX/commit/f07aed904d0dbf52f24267f54105912ec800b750