diff --git a/backend/src/api/websocket-handler.ts b/backend/src/api/websocket-handler.ts
index 925b676f1..2884f72eb 100644
--- a/backend/src/api/websocket-handler.ts
+++ b/backend/src/api/websocket-handler.ts
@@ -52,7 +52,7 @@ class WebsocketHandler {
 
   private socketData: { [key: string]: string } = {};
   private serializedInitData: string = '{}';
-  private lastRbfSummary: ReplacementInfo | null = null;
+  private lastRbfSummary: ReplacementInfo[] | null = null;
 
   constructor() { }
 
@@ -464,10 +464,11 @@ class WebsocketHandler {
     let rbfReplacements;
     let fullRbfReplacements;
     let rbfSummary;
-    if (Object.keys(rbfChanges.trees).length) {
+    if (Object.keys(rbfChanges.trees).length || !this.lastRbfSummary) {
       rbfReplacements = rbfCache.getRbfTrees(false);
       fullRbfReplacements = rbfCache.getRbfTrees(true);
-      rbfSummary = rbfCache.getLatestRbfSummary();
+      rbfSummary = rbfCache.getLatestRbfSummary() || [];
+      this.lastRbfSummary = rbfSummary;
     }
 
     for (const deletedTx of deletedTransactions) {
diff --git a/frontend/src/app/services/websocket.service.ts b/frontend/src/app/services/websocket.service.ts
index b4625b87c..53d3d5f5f 100644
--- a/frontend/src/app/services/websocket.service.ts
+++ b/frontend/src/app/services/websocket.service.ts
@@ -330,8 +330,8 @@ export class WebsocketService {
       this.stateService.rbfLatest$.next(response.rbfLatest);
     }
 
-    if (response.rbfLatestSummary) {
-      this.stateService.rbfLatestSummary$.next(response.rbfLatestSummary);
+    if (response.rbfLatestSummary !== undefined) {
+      this.stateService.rbfLatestSummary$.next(response.rbfLatestSummary || []);
     }
 
     if (response.txReplaced) {