Characters typed when using shortcut

[Axel29]

Describe the bug

A character ("A", "B", "C" or "D") is entered in the terminal command when using a shortcut to change the focused terminal.
Using Ubuntu 22.04.

Expected behavior

1. The terminal focused is changed
2. Nothing happens on the original (source) terminal

Actual behavior

1. The original (source) terminal shows a letter:

• A for above
• B for bellow
• C for right
• D for left

To Reproduce

1. Assign "ALT + Up" / "Alt + Down" / "Alt + Left" / "Alt + Right" keyboard shortcuts to the "Focus terminal ..." shortcuts
2. Use these shortcuts

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$ guake --support

Guake Version: 3.8.5

Vte Version: 0.68.0

Vte Runtime Version: 0.68.0

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GTK+ Version: 3.24.33

GDK Backend: <GdkX11.X11Display

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Desktop Session: ubuntu-xorg

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Display: :0

RGBA visual: True

Composited: True

• Monitor: 0 - BOE eDP
  • Geometry: 1920 x 1080 at 0, 502
  • Size: 309 x 174 mm²
  • Primary: True
  • Refresh rate: 60.0 Hz
  • Subpixel layout: unknown
• Monitor: 1 - PHL DisplayPort-1
  • Geometry: 1680 x 1050 at 1920, 0
  • Size: 474 x 296 mm²
  • Primary: False
  • Refresh rate: 59.954 Hz
  • Subpixel layout: unknown

[novaTopFlex]

I am not sure about this, but I believe that this behavior is very similar to the behavior for my system except that there might actually be more indicators such as ^[A, ^[B, ^[C, or ^[D. However, I believe that these are not intended to be treated as letters. Are you sure that the only characters that appear are the letters?