Remote Control: mobile push notifications never deliver despite paired/working session

Summary: With Remote Control paired and working (the session can be driven from the phone), PushNotification reports "Mobile push requested" but the notification never arrives on the phone. Desktop/terminal notifications work normally.

Environment

• Claude Code on Windows 11 (win32), model Opus 4.7
• Remote Control: "Enabled for all sessions" via /config
• Mobile app signed in with the same Anthropic account as the CLI session
• Phone confirmed interactively connected — user actively sent session input from the phone during debugging

Expected: When PushNotification returns "Mobile push requested" and the suppression gates are clear, the notification reaches the phone.

Actual: Terminal notification delivers; mobile push never arrives. ~6 test sends across varied conditions, none received on the phone.

Ruled out during debugging

• Account mismatch — same account on app and CLI
• OS notification permission for the Claude app — already enabled
• Pairing — confirmed; user actively sends input from the phone
• Activity gate — retested while idle >60s
• Terminal-focus gate — retested with terminal defocused/minimized (observed message: Not sent — terminal has focus. Terminal + mobile suppressed.)
• Phone VPN — retested with VPN disabled; still no delivery

Notes / possible leads

• The mobile app has no "Remote Control" section; remote sessions appear under the "Code" tab.
• Interactive Remote Control works but push does not — interactive control and push delivery may use different transports, and only the push (APNs/FCM token registration) path appears to be failing.

Repro

1. Pair a phone with a Claude Code session via Remote Control (confirm by sending input from the phone).
2. Trigger a proactive notification while the terminal is unfocused and the user idle >60s.
3. Observe "Mobile push requested" returned, but nothing arrives on the phone.