Bug#1033898: gnome-text-editor: Scroll bar disappears after entering invalid char with compose key

[xMax]

Package: gnome-text-editor
Version: 43.2-1
Severity: normal

Dear Maintainer,

*** Reporter, please consider answering these questions, where appropriate ***

   * What led up to the situation?
Using keyboard layout English (Macintosh), one of the layouts offered by a
standard Debian install. The AltGr key acts as the Compose key. I believe this
is set by the keyboard layout, but system Settings > Keyboard > Special
Character Entry > Compose Key also shows "Right Alt". But when using other
keyboard layouts the AltGr key does not function as Compose key and this bug
doesn't apply.


   * What exactly did you do (or not do) that was effective (or
     ineffective)?
In new Text Editor window, open a document long enough to trigger the scroll
bar.
Place cursor at the beginning of an empty line.
Press AltGr
        An underline with a dot above it appears.
Press s (or any key that doesn't immediately lead to a valid final character)
        Dot changes to an s, you now have an underlined s.
Press space.
        The underlined s disappears.
Press backspace.


   * What was the outcome of this action?
The scrollbar stops functioning.
If /org/gnome/desktop/interface/overlay-scrolling is set to false in dconf
Editor, the movable marker in the scrollbar disappears and it becomes equally
inoperable.

The scrollbar will come back if another document is open in another tab, that
other tab is brought to the front and then switched back to the original tab


   * What outcome did you expect instead?
AltGr not having any effect on scroll bar.


   * Debug Info from Text Editor:
Text Editor (43.2)

GLib: 2.74.6 (2.74.4)
GTK: 4.8.3 (4.8.3)
GtkSourceView: 5.6.2 (5.6.2)
Libadwaita: 1.2.2 (1.2.1)
Enchant2: 2.3.3

gtk-theme-name: Adwaita-empty
GTK_THEME: unset

org.gnome.TextEditor restore-session = true
org.gnome.TextEditor recolor-window = true
org.gnome.TextEditor show-map = false
org.gnome.TextEditor custom-font = 'Monospace 11'
org.gnome.TextEditor show-line-numbers = true [default=false]
org.gnome.TextEditor style-scheme = 'kate' [default='Adwaita']
org.gnome.TextEditor wrap-text = true
org.gnome.TextEditor style-variant = 'follow'
org.gnome.TextEditor indent-style = 'tab'
org.gnome.TextEditor show-right-margin = false
org.gnome.TextEditor spellcheck = true
org.gnome.TextEditor auto-indent = true
org.gnome.TextEditor use-system-font = true
org.gnome.TextEditor keybindings = 'default'
org.gnome.TextEditor highlight-current-line = false
org.gnome.TextEditor last-save-directory = 'file:///home/xxxx/Documents'
[default='']
org.gnome.TextEditor auto-save-delay = uint32 3
org.gnome.TextEditor discover-settings = true
org.gnome.TextEditor enable-snippets = false
org.gnome.TextEditor line-height = 1.2
org.gnome.TextEditor indent-width = -1
org.gnome.TextEditor show-grid = false
org.gnome.TextEditor draw-spaces = @as []
org.gnome.TextEditor right-margin-position = uint32 80
org.gnome.TextEditor tab-width = uint32 8

*** End of the template - remove these template lines ***


-- System Information:
Debian Release: 12.0
  APT prefers testing-security
  APT policy: (500, 'testing-security'), (500, 'testing')
Architecture: amd64 (x86_64)

Kernel: Linux 6.1.0-6-amd64 (SMP w/12 CPU threads; PREEMPT)
Locale: LANG=en_US.UTF-8, LC_CTYPE=en_US.UTF-8 (charmap=UTF-8), LANGUAGE not set
Shell: /bin/sh linked to /usr/bin/dash
Init: systemd (via /run/systemd/system)
LSM: AppArmor: enabled

Versions of packages gnome-text-editor depends on:
ii  dconf-gsettings-backend [gsettings-backend]  0.40.0-4
ii  libadwaita-1-0                               1.2.2-1
ii  libc6                                        2.36-8
ii  libcairo2                                    1.16.0-7
ii  libeditorconfig0                             0.12.6-0.1
ii  libenchant-2-2                               2.3.3-2
ii  libglib2.0-0                                 2.74.6-1
ii  libgtk-4-1                                   4.8.3+ds-2
ii  libgtksourceview-5-0                         5.6.2-1
ii  libicu72                                     72.1-3
ii  libpango-1.0-0                               1.50.12+ds-1

gnome-text-editor recommends no packages.

gnome-text-editor suggests no packages.

-- no debconf information