Environment

• OS: Windows 10 / Windows 11 / Linux
• Eclipse Version: 2025-12 (4.38.0), 2026-03 (4.39.0)
• GitHub Copilot for Eclipse: affected
• SonarQube for Eclipse: 11.24.0, 11.25.0, 11.26, 12.1.0

Describe the bug
When GitHub Copilot for Eclipse and SonarQube for Eclipse are installed together, red rectangular borders appear around SonarQube issue locations in the Eclipse editor.

The same SonarQube setup does not show this problem when the Copilot plugin is not installed. The annotation label can be Text to be Deleted, which appears to match GitHub Copilot for Eclipse's Next Edit Suggestions delete annotation.

The red boxes are visually noisy and misleading because they are drawn around SonarQube issue locations. They may also remain visible after the SonarQube quick fix is applied.

To Reproduce

1. Install SonarQube for Eclipse / SonarQube for IDE.
2. Install GitHub Copilot for Eclipse.
3. Open a Java or TypeScript file containing a SonarQube issue.
4. Observe the red rectangular border around the issue location.
5. Fix the issue manually or apply the SonarQube quick fix.
6. Observe that the red border may remain visible.

Example:

import java.util.List;

public class TestSonar {
    boolean isEmpty(List l) {
        return l == null || l.size() == 0;
    }
}

Expected behavior
GitHub Copilot for Eclipse should not draw Text to be Deleted / Next Edit Suggestions annotations over SonarQube issue locations.

Copilot annotations should only appear for active Copilot suggestions and should be cleared when the suggestion is accepted, rejected, or no longer relevant. SonarQube issue decorations should not be affected by the Copilot plugin.

Screenshots

Additional context
This appears to be caused by GitHub Copilot for Eclipse. With SonarQube for Eclipse installed alone, the red-border issue is not reproducible.

The likely source is Copilot's Next Edit Suggestions delete annotation, which is registered with a generic Eclipse text marker and uses boxed text styling.

Relevant Copilot declaration:

<type
    name="com.microsoft.copilot.eclipse.ui.nes.delete"
    markerType="org.eclipse.core.resources.textmarker">
</type>

<specification
    annotationType="com.microsoft.copilot.eclipse.ui.nes.delete"
    label="Text to be Deleted"
    textStylePreferenceValue="BOX">
</specification>