Requests not balanced across replicas when using WithReplicas(2)

### Is there an existing issue for this?

- [x] I have searched the existing issues

### Describe the bug

I'm experiencing an issue where all requests are routed to a single replica, even though I've set .WithReplicas(2) for the apiService. I expected the load to be distributed across both replicas, but instead, it appears to always target only one.

Source code:
https://github.com/piotreksda/aspire-tests

Code Sample:
```cs
var apiService = builder.AddProject("apiservice")
.WithReference(messageBus)
.WithReference(redisCache)
.WithHttpsEndpoint(name: "httpsProxies", port: 21372) //same without it
.WithReplicas(2);
```
Request: [POST] `https://localhost:21372/send-command?content=test-123-123`

Replica 1:

Replica 2:

Environment:
Device: MacBook (Apple Silicon series)
OS: macOS 15.1
Actual Behavior:
All requests are routed to a single replica, causing an imbalance in load distribution.

https://github.com/piotreksda/aspire-tests

### Expected Behavior

Requests should be distributed across the two replicas specified.

### Steps To Reproduce

1. clone https://github.com/piotreksda/aspire-tests
2. run with https
3. send some requests to Request: [POST] `https://localhost:21372/send-command?content=test-123-123`
4. logs appears only in one replica

### Exceptions (if any)

_No response_

### .NET Version info

dotnet --info
.NET SDK:
Version: 8.0.401
Commit: 811edcc344
Workload version: 8.0.400-manifests.e0880c5d
MSBuild version: 17.11.4+37eb419ad

Runtime Environment:
OS Name: Mac OS X
OS Version: 15.1
OS Platform: Darwin
RID: osx-arm64
Base Path: /usr/local/share/dotnet/sdk/8.0.401/

.NET workloads installed:
Configured to use loose manifests when installing new manifests.
[aspire]
Installation Source: SDK 8.0.400
Manifest Version: 8.2.2/8.0.100
Manifest Path: /usr/local/share/dotnet/sdk-manifests/8.0.100/microsoft.net.sdk.aspire/8.2.2/WorkloadManifest.json
Install Type: FileBased

Host:
Version: 8.0.8
Architecture: arm64
Commit: 08338fcaa5

.NET SDKs installed:
6.0.425 [/usr/local/share/dotnet/sdk]
7.0.410 [/usr/local/share/dotnet/sdk]
8.0.401 [/usr/local/share/dotnet/sdk]

.NET runtimes installed:
Microsoft.AspNetCore.App 6.0.33 [/usr/local/share/dotnet/shared/Microsoft.AspNetCore.App]
Microsoft.AspNetCore.App 7.0.20 [/usr/local/share/dotnet/shared/Microsoft.AspNetCore.App]
Microsoft.AspNetCore.App 8.0.8 [/usr/local/share/dotnet/shared/Microsoft.AspNetCore.App]
Microsoft.NETCore.App 6.0.33 [/usr/local/share/dotnet/shared/Microsoft.NETCore.App]
Microsoft.NETCore.App 7.0.20 [/usr/local/share/dotnet/shared/Microsoft.NETCore.App]
Microsoft.NETCore.App 8.0.8 [/usr/local/share/dotnet/shared/Microsoft.NETCore.App]

### Anything else?

I use Rider but tried with cli and same behaviour