Informing the user about the result of async Purchases.shared.restorePurchases()

The sample app is pretty light when it comes to restoring purchases:          

            Button("Restore Purchases") {
                Task {
                    try? await Purchases.shared.restorePurchases()
                }
            }

There are 3 possible outcomes when it comes to a subscription:

• Success
• Failure due to lack of active subscription
• Error

I want to be able to show an alert of sorts in all 3 cases.

My view has two variables:

@Environment(\.isPremium) var isPremium
@EnvironmentObject var customer: Customer

Where customer is Purchases’ delegate and has the CustomerInfo

and isPremium derives its value from that customer, an @ObservedObject of my app:

.environment(\.isPremium, customer.isPremium)

The button to restore looks like this.

                Button(action: {
                    isRestoringPurchase = true
                    Task {
                        do {
                            let _ = try await Purchases.shared.restorePurchases()
                        } catch {
                            // Inform user of error
                        }
                        // Inform user of result based on customer.isPremium
                        isRestoringPurchase = false
                    }
                })

This works fine: restorePurchases() calls its delegate (which is  and customer is updated by the time I use it to inform the user.

But, if I use the env var isPremium instead of customer.isPremium, its value is not updated in time to inform the user, but only shortly after.

Two questions:
1. why the lag? It feels like it’s just a matter of one cycle being missed.
2. is there another way to approach this?