diff --git a/sdk/monitor/Azure.Monitor.OpenTelemetry.AspNetCore/CHANGELOG.md b/sdk/monitor/Azure.Monitor.OpenTelemetry.AspNetCore/CHANGELOG.md
index 7d059cd4d4fb..5a95a693feb9 100644
--- a/sdk/monitor/Azure.Monitor.OpenTelemetry.AspNetCore/CHANGELOG.md
+++ b/sdk/monitor/Azure.Monitor.OpenTelemetry.AspNetCore/CHANGELOG.md
@@ -8,6 +8,10 @@
 
 ### Bugs Fixed
 
+* Fixed an issue where Azure Container Apps instances were showing VM instance GUIDs
+  instead of replica names in the Role Instance field.
+  ([#54586](https://github.com/Azure/azure-sdk-for-net/pull/54586))
+
 ### Other Changes
 
 ## 1.4.0 (2025-11-14)
diff --git a/sdk/monitor/Azure.Monitor.OpenTelemetry.AspNetCore/src/OpenTelemetryBuilderExtensions.cs b/sdk/monitor/Azure.Monitor.OpenTelemetry.AspNetCore/src/OpenTelemetryBuilderExtensions.cs
index 62ec54d18c2d..93fd21b8b6b8 100644
--- a/sdk/monitor/Azure.Monitor.OpenTelemetry.AspNetCore/src/OpenTelemetryBuilderExtensions.cs
+++ b/sdk/monitor/Azure.Monitor.OpenTelemetry.AspNetCore/src/OpenTelemetryBuilderExtensions.cs
@@ -84,8 +84,8 @@ public static OpenTelemetryBuilder UseAzureMonitor(this OpenTelemetryBuilder bui
             Action<ResourceBuilder> configureResource = (r) => r
                 .AddAttributes(new[] { new KeyValuePair<string, object>("telemetry.distro.name", "Azure.Monitor.OpenTelemetry.AspNetCore") })
                 .AddDetector(new AppServiceResourceDetector())
-                .AddDetector(new AzureContainerAppsResourceDetector())
-                .AddDetector(new AzureVMResourceDetector());
+                .AddDetector(new AzureVMResourceDetector())
+                .AddDetector(new AzureContainerAppsResourceDetector());
 
             builder.ConfigureResource(configureResource);