Summary
Toolbar Upload fails in the extension host with undefined object access. Non-toolbar upload paths succeed, indicating an extension UI/task-state issue rather than a backend upload failure.

Environment

• OS: Windows
• VS Code build: fc3def6774
• PlatformIO IDE extension: 3.3.4
• PlatformIO Core: 6.1.19

Observed behavior

• Build command: succeeds.
• Upload via PlatformIO task/CLI: succeeds, exit code 0.
• Upload via toolbar button: throws TypeError and is unreliable.

Relevant error signatures seen in extension host logs

• TypeError: Cannot read properties of undefined (reading 'id')
  • in PlatformIO extension runTask path
  • invoked through toolbar command flow (runToolbarButtonCommand / onButtonClick)
• Also seen in same session:
  • Error: command platformio-ide.build already exists
  • TypeError: Cannot read properties of undefined (reading 'args') in task argument handling

Repro steps

1. Open PlatformIO project.
2. Select target environment.
3. Click toolbar Upload.
4. Observe TypeError in extension host.
5. Run equivalent task/CLI upload command.
6. Observe successful upload.

Expected behavior

• Toolbar Upload should execute without extension-side exceptions and match task/CLI behavior.

Actual behavior

• Toolbar Upload path throws extension exceptions even though the underlying upload path is valid.

Impact

• Users with multiple dynamic COM devices cannot rely on toolbar Upload, even though normal upload commands work.