Windows Computer Use: app launch/screenshots work, but click and press_key have no visible effect

Environment

Windows 11, native Windows agent environment.
Codex MSIX version: 26.901.6511.0.
Installed @oai/sky runtime version: 0.6.26.
Using the machine through ToDesk; a local-console comparison is not currently possible. ToDesk is NOT established as the cause.

Reproduction

1. Initialize the installed runtime through the available Node tool: sky = (await import("@oai/sky")).sky.
2. Use list_apps, launch_app, get_window and get_window_state to open Windows Calculator.
3. click a numeric button using observed window-relative screenshot coordinates (also tested with screenshotId), or press_key({window, key:"2"}).
4. Capture fresh state. The display does not change.
5. Repeat a harmless File-menu click in Paint: launch and screenshots succeed, but the menu does not open.

Expected / actual

Expected: Calculator accepts input and Paint opens its menu.
Actual: input calls return without a reported error; screenshots show no corresponding UI change.
Manual user input DOES work and is reflected in subsequent screenshots.
include_text:true returned accessibility:null in Calculator.

Diagnostics

Recreating the Node control session did not resolve it.
Control runtime and Calculator are in Windows session 1.
Helper integrity level: medium; Calculator integrity level: low.
Ctrl/Alt/Shift and mouse buttons were not held at the sampled check.
The app's native-pipe startup log reports ready.
Two helper processes were identified as the main helper plus its system-cursor-manager child, not established duplicate controllers.

Earlier distinct setup failures

Old computer-use cache 26.527.31326 lacked tslib.es6.js. One missing file was copied from the installed runtime; module import then passed.
The old cache bootstrap returned "Computer Use native pipe is unavailable". Using the current runtime initialization above enabled app discovery/launch/capture, but input still failed.
A separate browser control attempt failed because its configured browser-service.mjs path points to a nonexistent old bundled/browser cache; the current runtime contains that service file. This has not been changed.

Please advise a supported way to obtain input-delivery diagnostics or whether a compatible runtime/update fixes this. No private screenshots, account identifiers or full logs are attached. This report was prepared by Codex from user-authorized diagnostics.

Start by reviewing the @oai/sky 0.6.26 input path used after list_apps, launch_app, get_window, and get_window_state succeed, using the reported Calculator and Paint reproductions. Done means obtaining input-delivery diagnostics or confirming that a compatible runtime/update fixes click and press_key while preserving screenshots and app launch.