2026-06-24 00:18:53 +00:00
1 changed files with 5 additions and 0 deletions
@@ -270,6 +270,11 @@ function startGame(seed) {

 // ── Timer ────────────────────────────────────────────────────────────────────
 function startTimer() {
+    // Idempotent: never stack a second interval. The visibilitychange handler
+    // and startGame can both call this, and a stray call (e.g. a load-time
+    // visibilitychange while a timer is already running) would otherwise leak
+    // the old interval and make elapsedSecs increment twice per second.
+    if (timerInterval) return;
    timerInterval = setInterval(() => {
        elapsedSecs++;
        updateTimerDisplay();