diff --git a/src/backend/src/main/kotlin/org/icpclive/service/ServiceRoot.kt b/src/backend/src/main/kotlin/org/icpclive/service/ServiceRoot.kt
index 928015ec..75b32894 100644
--- a/src/backend/src/main/kotlin/org/icpclive/service/ServiceRoot.kt
+++ b/src/backend/src/main/kotlin/org/icpclive/service/ServiceRoot.kt
@@ -25,6 +25,7 @@ fun CoroutineScope.launchServices(loader: Flow<ContestUpdate>) {
     }
     val normalScoreboardState = loader
         .calculateScoreboard(OptimismLevel.NORMAL)
+        .buffer(Int.MAX_VALUE)
         .shareIn(this, starter)
 
     fun CoroutineScope.launchService(service: Service) = launch {