Remote Control session drops intermittently even when desktop-side connection is stable

Summary

Using Claude Desktop's Remote Control feature (view/control a Mac session from the Claude iOS app), the mobile app repeatedly shows the remote session as disconnected, even while actively viewing the screen in the foreground. This happens on both Wi-Fi and cellular data, ruling out network-type as the cause, and happens mid-use (not just after backgrounding the app), ruling out iOS background suspension.

Environment

• Claude Desktop (macOS), Apple Silicon
• Remote Control feature (remoteToolsDeviceName device bridge over wss://bridge.claudeusercontent.com)
• Claude iOS app viewing the remote session

Investigation done

• A separate prior issue (two Macs both using the device name imac-lan, causing socket closed: 4000 Superseded by newer connection every ~5 min) was identified and fixed by giving each Mac a unique remoteToolsDeviceName and restarting the app.
• After that fix, ~/Library/Logs/Claude/main.log on the Mac shows zero socket closed / Superseded events for 3+ hours of continuous uptime, and the desktop-to-bridge TCP connection stays ESTABLISHED throughout (verified via lsof).
• Despite the Mac-side connection being fully stable, the phone-side session still drops:
• Happens on both Wi-Fi and mobile data (not a network-switching issue)
• Happens while actively viewing the screen in the foreground (not an iOS background-suspension issue)
• Since the Mac's local log shows no trace of the drop, the disconnect appears to originate either on the relay/bridge server side, or in the iOS app's own connection handling — something not diagnosable from the Mac's local files/logs.

Expected behavior

The Remote Control session on the phone should remain stable as long as the desktop-side connection is healthy, or at minimum should recover/reconnect gracefully and quickly without requiring manual intervention.

Actual behavior

Mobile app repeatedly reports the remote session as disconnected while the desktop-side bridge connection shows no errors.