Push notifications not delivered on Android (Samsung S23) despite Remote Control showing Connected

Environment

• Device: Samsung Galaxy S23
• Claude Android app: latest
• Claude Code CLI on Windows 11
• GitHub account: muckybuzzwoo

Description

Push notifications from the PushNotification tool are never delivered to the Android device, even though all settings appear correct.

Confirmed working:

• Remote Control shows "Verbunden" (Connected) in green in the Android app
• Claude Code CLI reports "Terminal notification sent. Mobile push requested."
• Android notification permissions fully enabled (Allow ✓, Sound & Vibration ✓, Lock screen ✓, Banner ✓)
• Battery optimization for Claude set to "Unrestricted" (tested both before and after this change)
• App was running in the background (not force-closed) during all tests
• User inactivity confirmed >60s before each push attempt (CLI threshold is 60s)

Steps to Reproduce

1. Open Claude Android app — session shows "Connected" (green) under Remote Control
2. Send app to background via Home button (not force-closed)
3. Run a long task in Claude Code CLI on desktop that triggers PushNotification
4. Wait >60s of user inactivity — CLI confirms "Terminal notification sent. Mobile push requested."
5. No notification appears on the Android device

Expected Behavior

A push notification banner appears on the Android device when the CLI reports "Mobile push requested."

Actual Behavior

No notification is delivered. The CLI confirms the push was requested but nothing arrives on the phone. The session shows as Connected in the Android app throughout.

Additional Notes

• All other apps (Chrome, WhatsApp, Email) deliver notifications normally on this device
• Tested 6+ times across one session with varying conditions
• Battery optimization set to "Unrestricted" after initial tests — no improvement
• Samsung S23, standard Android (no custom ROM, no special notification blockers)
• The 60s inactivity threshold was consistently exceeded before each push attempt

<img width="300" alt="Image" src="https://github.com/user-attachments/assets/58fef362-e866-4025-9315-9e1f24960ac3" />
<img width="300" alt="Image" src="https://github.com/user-attachments/assets/f87ea1bb-6ff2-49f7-953c-3ed5bd4cdce6" />
<img width="300" alt="Image" src="https://github.com/user-attachments/assets/485e8223-6033-4f5e-b773-fbf28cd11c59" />