diff --git a/src/browser/Page.zig b/src/browser/Page.zig
index c1350a0e..40b73618 100644
--- a/src/browser/Page.zig
+++ b/src/browser/Page.zig
@@ -1246,7 +1246,7 @@ pub fn notifyPerformanceObservers(self: *Page, entry: *Performance.Entry) !void
     try self.schedulePerformanceObserverDelivery();
 }
 
-/// Schedules async delivery of buffered performance observer records.
+/// Schedules async delivery of performance observer records.
 pub fn schedulePerformanceObserverDelivery(self: *Page) !void {
     // Already scheduled.
     if (self._performance_delivery_scheduled) {
diff --git a/src/browser/webapi/PerformanceObserver.zig b/src/browser/webapi/PerformanceObserver.zig
index 38f2a028..cfabaebb 100644
--- a/src/browser/webapi/PerformanceObserver.zig
+++ b/src/browser/webapi/PerformanceObserver.zig
@@ -117,7 +117,7 @@ pub fn observe(
     // Deliver existing entries if buffered option is set.
     // Per spec, buffered is only valid with the type option, not entryTypes.
     // Delivery is async via a queued task, not synchronous.
-    if (options.buffered and options.type != null) {
+    if (options.buffered and options.type != null and !self.hasRecords()) {
         for (page.window._performance._entries.items) |entry| {
             if (self.interested(entry)) {
                 try self._entries.append(page.arena, entry);