I'm just hitting the weirdest issues today:

const appservicePlan = new azure.appservice.Plan("asp", {
    resourceGroupName: resourceGroup.name,
    kind: "linux",
    sku: { tier: "Dynamic", size: "Y1" },
    reserved: true
});
const app = new azure.appservice.ArchiveFunctionApp("App", {
    resourceGroupName: resourceGroup.name,
    name: functionAppName,
    plan: appservicePlan,
    version: "~3",
    archive: new pulumi.asset.FileArchive("./app"),
    appSettings: {
        "runtime": "python"
    }
});

I deploy this and all is fine, next time around though, Pulumi wants to replace the App Service Plan because on the API the

kind

is now

functionapp

? All the examples set

kind

to

linux

.