[BUG] [Billing Bug] Gift subscription (Max) redeemed but account reverted to Free plan — gift lost, no extension applied

Preflight Checklist

• [x] I have searched existing issues and this hasn't been reported yet
• [x] This is a single bug report (please file separate reports for different bugs)
• [x] I am using the latest version of Claude Code

What's Wrong?

I redeemed a Claude Max gift subscription on August 14, 2026 (~14:00 UTC) while I already had an active Max subscription. According to Anthropic's documented gift redemption process, a Max subscriber receiving a Max gift should have their subscription extended by the gift duration.

Instead:

• The gift redemption showed a successful on-screen confirmation at the time.
• It briefly appeared in Settings > Billing, then disappeared.
• My Max subscription's renewal/expiration date never changed.
• My Max subscription has since expired, and my account is now on the Free plan.
• Revisiting the same gift link now shows "gift unavailable", confirming the code was marked as redeemed on Anthropic's backend.
• No confirmation email for the redemption was ever received.

What Should Happen?

Per Anthropic's own documentation: a Max subscriber (web) who redeems a Max gift should have their subscription extended by the gift duration, with no interruption to paid access.

Instead, the gift was consumed (link now shows "unavailable") but never applied — my subscription lapsed to the Free plan despite a valid, successfully-redeemed gift.

Error Messages/Logs

No error message appeared at the time of redemption — the gift showed a successful on-screen confirmation.

The only "error" indicator now is that revisiting the same gift link shows "gift unavailable":
https://claude.ai/gift/redeem?code=2e3c3856-0363-480d-ac5a-3a310fc5f044

Support (Fin AI Agent) confirmed via chat that "the redemption was recorded... but the subscription extension didn't process correctly" and that this "appears to be a technical issue" on Anthropic's end.
Support conversation ID: 215475595916438

Steps to Reproduce

1. Have an active Claude Max subscription on the web (claude.ai).
2. Receive a Claude Max gift subscription link from another user.
3. Open the gift link and redeem it while the Max subscription is still active.
4. Observe the on-screen confirmation that the gift was successfully redeemed.
5. Check Settings > Billing shortly after — the gift may briefly appear there, then disappear.
6. Wait until the original Max subscription period ends.
7. Instead of the subscription being extended by the gift duration, the account reverts to the Free plan.
8. Revisit the same gift link — it now shows "gift unavailable," confirming the code was marked as redeemed even though the extension was never applied.

Claude Model

None

Is this a regression?

I don't know

Last Working Version

_No response_

Claude Code Version

N/A — this is a billing/gift subscription issue on claude.ai, not Claude Code CLI

Platform

Anthropic API

Operating System

macOS

Terminal/Shell

Terminal.app (macOS)

Additional Information

_No response_