Fix TimedTask if not changed

backend/mirai-console/src/util/CoroutineScopeUtils.kt

@@ -68,6 +68,11 @@ internal class TimedTask(
         // `delay` always checks for cancellation
         lastChangedTime.loop { last ->
             val current = currentTimeMillis()
+            if (last == UNCHANGED) {
+                runIgnoreException<CancellationException> {
+                    delay(3.seconds) // accuracy not necessary
+                } ?: return@launch
+            } else {
                 if (current - last > intervalMillis) {
                     if (!lastChangedTime.compareAndSet(last, UNCHANGED)) return@loop
                     action()
@@ -77,6 +82,7 @@ internal class TimedTask(
                 } ?: return@launch
             }
         }
+    }
 }
 
 internal fun CoroutineScope.launchTimedTask(