https://bugs.documentfoundation.org/show_bug.cgi?id=172002

            Bug ID: 172002
           Summary: [26.8] Setting background of Textbox to Gradient, it
                    may sometimes become invisible (kf/qt)
           Product: LibreOffice
           Version: 26.8.0.0 alpha0+ master
          Hardware: All
                OS: Linux (All)
            Status: UNCONFIRMED
          Severity: normal
          Priority: medium
         Component: Calc
          Assignee: [email protected]
          Reporter: [email protected]

Description:
Setting background of Textbox to Gradient, it may sometimes become invisible.

Steps to Reproduce:
1. Open new Calc.
2. Insert Textbox, and write some text.
3. Set the gradient as the background color for the text box.
   Choose "London Mist" for the gradient type.

Actual Results:
4. The Textbox may become invisible at times.
   You may be able to reproduce the issue by repeatedly selecting the Textbox
and then selecting the cell.

Expected Results:
4. The Textbox should always be visible.


Reproducible: Always


User Profile Reset: No

Additional Info:

This issue can be confirmed on Linux OS with kf/qt.
This phenomenon can occasionally be observed in Linux-OS gtk environments,
No such issues were observed on Windows OS or Linux-OS gen.

Strangely, when dotted or dashed border lines are present, the text box remains
visible.
Removing the dotted or dashed lines or changing them to solid lines will make
the text box disappear again.

Potentially related commits ( Mon Apr 27 08:58:03 2026 +0200 ) :
https://git.libreoffice.org/core/+/d8f87cb61f4c70a8f294360e8991a179f4b7eed7%5E%21

Reproducible
[2026-04-30]
Version: 26.8.0.0.alpha0+ (X86_64)
Build ID: b1e601a83dc811319353499f023a11ecb710f8e5
CPU threads: 2; OS: Linux 6.12; UI render: default; VCL: kf5 (cairo+xcb)
Locale: ja-JP (ja_JP.UTF-8); UI: en-US
Calc: threaded

Reproducible
[2026-04-30]
Version: 26.8.0.0.alpha0+ (X86_64)
Build ID: b1e601a83dc811319353499f023a11ecb710f8e5
CPU threads: 2; OS: Linux 6.12; UI render: default; VCL: qt5 (cairo+xcb)
Locale: ja-JP (ja_JP.UTF-8); UI: en-US
Calc: threaded

Reproducible rarely
[2026-04-30]
Version: 26.8.0.0.alpha0+ (X86_64)
Build ID: b1e601a83dc811319353499f023a11ecb710f8e5
CPU threads: 2; OS: Linux 6.12; UI render: default; VCL: gtk3
Locale: ja-JP (ja_JP.UTF-8); UI: en-US
Calc: threaded

---

Not reproducible
[2026-04-30]
Version: 26.8.0.0.alpha0+ (X86_64)
Build ID: b1e601a83dc811319353499f023a11ecb710f8e5
CPU threads: 2; OS: Linux 6.12; UI render: default; VCL: x11
Locale: ja-JP (ja_JP.UTF-8); UI: en-US
Calc: threaded

Not reproducible
[2026-04-20]
Version: 26.8.0.0.alpha0+ (X86_64)
Build ID: 05f7513a5fec87296cfac298f5fd3bfd0e0fc4bb
CPU threads: 2; OS: Linux 6.12; UI render: default; VCL: kf5 (cairo+xcb)
Locale: ja-JP (ja_JP.UTF-8); UI: en-US
Calc: threaded

Not reproducible
Version: 26.2.3.2 (X86_64)
Build ID: 70e089b17412e4cb7773e41413306b17a2328c34
CPU threads: 2; OS: Linux 6.12; UI render: default; VCL: kf5 (cairo+xcb)
Locale: ja-JP (ja_JP.UTF-8); UI: en-US
Calc: threaded

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