Docker "no digest available" repro

MyStack.cs

using System;
using System.Collections.Generic;
using System.Threading.Tasks;
using Pulumi;
using Pulumi.AzureNextGen.ContainerRegistry.Latest;
using SkuArgs = Pulumi.AzureNextGen.ContainerRegistry.Latest.Inputs.SkuArgs;
using Pulumi.AzureNextGen.Resources.Latest;
using Pulumi.AzureNextGen.Resources.Latest.Inputs;
using Pulumi.Docker;

class MyStack : Stack
{
    public MyStack()
    {
        // Create an Azure Resource Group
        var resourceGroup = new ResourceGroup("resourceGroup", new ResourceGroupArgs
        {
            ResourceGroupName = "mikhail-rg",
            Location = "WestUS",
            Tags =
            {
                { "Owner", "mikhail" }
            }
        });
        
        var registry = new Registry("myregistry", new RegistryArgs
        {
            ResourceGroupName = resourceGroup.Name,
            RegistryName = $"registryboosa",
            Location = resourceGroup.Location,
            Sku = new SkuArgs { Name = "Basic" },
            AdminUserEnabled = true
        });

        var credentials = Output.Tuple(resourceGroup.Name, registry.Name).Apply(values =>
            ListRegistryCredentials.InvokeAsync(new ListRegistryCredentialsArgs
            {
                ResourceGroupName = values.Item1,
                RegistryName = values.Item2
            }));
        var adminUsername = credentials.Apply(c => c.Username ?? "");
        var adminPassword = credentials.Apply(c => Output.CreateSecret(c.Passwords.First().Value ?? ""));

        for (int a = 0; a < 30; a++)
        {
            new Image($"test{a}", new ImageArgs
            {
                ImageName = Output.Format($"{registry.LoginServer}/test{a}:v1.0.5"),
                Build = new DockerBuild {Context = $"./node-app"},
                Registry = new ImageRegistry
                {
                    Server = registry.LoginServer,
                    Username = adminUsername,
                    Password = adminPassword
                },
            });
        }
    }
}