STR:
Copy externally some file or image so that "Edit -> Paste" should be disabled.
Select some text in NPP.
Press "Ctrl+C".

Result:
"Edit -> Paste" is wrongly disabled.

Notepad++ v8.3.3 (64-bit)
Build time : Mar 15 2022 - 00:15:25
Path : C:---\notepad++.exe
Command Line :
Admin mode : ON
Local Conf mode : ON
Cloud Config : OFF
OS Name : Windows 10 Pro (64-bit)
OS Version : 2009
OS Build : 19042.985
Current ANSI codepage : 1255
Plugins : ComparePlus.dll HTMLTag.dll MenuIcons.dll PythonScript.dll _CustomizeToolbar.dll