iOS app version 0.18.0 – Clock continues after move in correspondence game (24h per move)

[uweban]

What happened?

In iOS (18.6.2.) lichess-app 0.18.0, during a correspondence game (24h per move), after executing a move, my remaining time continued counting down incorrectly. The opponent’s clock also counted down, and I eventually lost on time despite having made my move.

How can we reproduce the bug?

Steps / Observed behavior

1. Opened game at ~09:39, executed move with ~3–4h remaining.
2. App displayed the move correctly, but my clock continued counting down. Opponent’s clock also counted down.
3. Restarting the app did not resolve the issue.
4. Received loss notification at ~12:11.

Technical info

• All API requests returned 200 OK.
• Relevant logs:
• GET /api/mobile/my-games?ids=|kMzzxYk → game state fetched successfully
• POST /mobile/register/firebase/... → unrelated to move
• Ping during move: 356 ms (normal ~15–40 ms)
• Network stable otherwise (Wi-Fi worked for other apps)
• Reproducing the issue is difficult due to long time controls

Expected behavior

After move execution, my clock should stop; only opponent’s clock should count down.

Device

iPhone 11 Pro

Operating system

iOS 18.6.2

App version

0.18.0

Screenshots

No response

Additional context

Game: https://lichess.org/lkMzzxYk/black