[okular] [Bug 427431] New: Okular show square box around any text produce by AutoCAD

[rana]

https://bugs.kde.org/show_bug.cgi?id=427431

            Bug ID: 427431
           Summary: Okular show square box around any text produce by
                    AutoCAD
           Product: okular
           Version: 1.11.1
          Platform: Manjaro
                OS: Linux
            Status: REPORTED
          Severity: normal
          Priority: NOR
         Component: PDF backend
          Assignee: okular-devel at kde.org
          Reporter: eierajat.roy at gmail.com
  Target Milestone: ---

Created attachment 132201
  --> https://bugs.kde.org/attachment.cgi?id=132201&action=edit
this is my pdf file which I'm trying to view using okular

SUMMARY
Any pdf drawing file generated from AutoCAD software, it shows square box
around text.

STEPS TO REPRODUCE
1. Any pdf file with text generated from AutoCAD software
2. 
3. 

OBSERVED RESULT
This kind of box around text only visible on Okular pdf viewer, if i open same
document with other pdf viewer such as firefox or evince, it does not show
those box.

EXPECTED RESULT


SOFTWARE/OS VERSIONS : 1.11.1
Windows: 
macOS: 
Linux/KDE Plasma: x86_64 Linux 5.8.11-1-MANJARO
(available in About System)
KDE Plasma Version: KDE 5.74.0 / Plasma 5.19.5
KDE Frameworks Version: 5.74.0
Qt Version: 5.15.1

ADDITIONAL INFORMATION
I've tried tried check and unchecked "draw border around link" option in
accessibility setting in Okular. 
but it is same result. No different.
I'm attaching my file
here is the link of my screen shot of okular behave
https://pasteboard.co/JuE1OpZ.png 

This is screen shot of firefox pdf viewer of same document
https://pasteboard.co/JuE2Let.png

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