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I'm under Windows 11, French layout, and the issue occurs in editors such as Word or TexStudio.

When I combine AltGr with a key of the top line, trying to type [ or ] or \, the right symbol appears and, just after, I get the parasitic Alt+0-9 (single digit) symbol replacement such as a ♠ (spade), a ♥ (heart), a ☺ (smiley).

This happens regardless of the keyboard (happens on different laptops too), and regardless of any so-called "3rd-party" softwares running in the background.

This is by far the weirdest Windows bug I have ever had (and I've had some, believe me).

Any idea how to solve this?

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  • AltGr with [] works fine with a French keyboard layout. If this is an AHK problem, you need to add the .ahk file to your post.
    – harrymc
    Commented Feb 13, 2023 at 15:50
  • No, i'm not using ahk, basically. The issue is random and it began happening when new 1-digit shortcuts were introduced in recent Windows versions.
    – Vincent Krebs
    Commented Feb 13, 2023 at 15:52
  • related discussion - autohotkey.com/boards/viewtopic.php?p=507167#p507167
    – xypha
    Commented Feb 13, 2023 at 17:10
  • linked Q&A - superuser.com/a/1764765/391770
    – xypha
    Commented Feb 13, 2023 at 17:11
  • The Windows keyboard should not do that. It's probably some third-party product.
    – harrymc
    Commented Feb 13, 2023 at 18:17

1 Answer 1

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The issue is a documented bug supposedly related to how Qt handles input and its faulty implementation in several LaTeX editors such as TexStudio.

I have, however, personally encountered it in Word, or Notepad itself, yet not known to use Qt. It is thus extremely probable that a driver installed by the TexStudio setup program could be the culprit.

There is currently no fix. The topic is discussed on the following pages.

https://github.com/texstudio-org/texstudio/issues/164

https://sourceforge.net/p/texstudio/bugs/2401/

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