Code tab: sessions sync only one direction across devices on the same account

Summary

Two Macs signed into the same individual account with a single personal workspace. Code-tab session visibility works in one direction only:

• On Machine B (Mac Mini) I can see Machine A (MacBook)'s Code sessions. ✅
• On Machine A (MacBook) I cannot see any of Machine B (Mac Mini)'s Code sessions. ❌

Environment

• Two Apple Silicon Macs, same individual account, single personal workspace (no org switching involved)
• Reporting machine (MacBook): Claude desktop Code 2.1.160, VM 2.1.156, macOS 26.3.1 (build 25D771280a)

Steps / what I observe

1. Sign both machines into the same account.
2. Enable "Enable remote control by default" (Settings → Claude Code) on both.
3. Restart the apps; start new sessions on each machine.
4. From the Mac Mini, the MacBook's sessions appear in the Code tab. From the MacBook, the Mac Mini's sessions never appear.

Ruled out

• ✅ "Enable remote control by default" is checked on both machines.
• ✅ Both machines awake, online, app running at the same time.
• ✅ New sessions created on the Mac Mini after enabling the toggle and restarting still don't appear (so it isn't a "new-sessions-only" gap).
• ✅ Single personal workspace on both — no workspace/org mismatch.
• ✅ Same account/login on both.

Technical detail

On the machine whose sessions are visible to the other (the MacBook), ~/Library/Application Support/Claude/bridge-state.json shows an active bridge: "enabled": true, "userConsented": true with a populated remoteSessionId/environmentId. The non-visible machine's sessions never surface, which suggests its bridge isn't registering server-side despite remote control being enabled.

Expected

With remote control enabled on all devices of one account, Code-tab sessions should be visible bidirectionally across those devices.

Actual

One-directional visibility only; the second machine's sessions never appear on the first.

Possibly related

Same app, session-handling problems: #64743