Description of the Issue

I opened the file and it froze, although I was able to close NOTEPAD++ after a few minutes

pattern_colors_broken_unc.pdf

Steps to Reproduce the Issue

1. open the file
2. try to click on anything

Expected Behavior

able to move

Actual Behavior

unable to move

Debug Information

Notepad++ v8.1.2 (32-bit)
Build time : Jul 16 2021 - 01:56:21
Path : C:\Program Files (x86)\Notepad++\notepad++.exe
Command Line :
Admin mode : OFF
Local Conf mode : OFF
Cloud Config : OFF
OS Name : Windows 10 Home (64-bit)
OS Version : 2009
OS Build : 19043.1110
Current ANSI codepage : 1252
Plugins : DSpellCheck.dll HexEditor.dll mimeTools.dll NppConverter.dll NppExport.dll