Custom purchase logic triggers unexpected “Confirm Plan” prompt and failed subscription

When I was originally developing using the PurchasesAreCompletedBy.REVENUECAT mode, everything worked fine.

However, since I needed to change the GoogleReplacementMode to DEFERRED, I had to switch to the PurchasesAreCompletedBy.MY_APP mode.

To support this, I passed a custom purchaseLogic to PaywallOptions via PaywallOptions.Builder.

But after switching to this approach, my subscription purchases started showing a “Confirm Plan” prompt, and the subscription would end up being automatically canceled.

Even after I manually called Purchases.sharedInstance.syncPurchases(), the issue still persisted.

Is there something wrong with my setup?

// Implementation of PurchaseLogic

override suspend fun performPurchase(
    activity: Activity,
    rcPackage: Package,
): PurchaseLogicResult {
    onPurchaseStarted(rcPackage)
    val purchaseParams = PurchaseParams.Builder(activity, rcPackage)
        .googleReplacementMode(GoogleReplacementMode.WITHOUT_PRORATION)
        .build()

    return try {
        val result = Purchases.sharedInstance.awaitPurchase(purchaseParams)
        onPurchaseCompleted(result.customerInfo, result.storeTransaction)        
        PurchaseLogicResult.Success
    } catch (e: PurchasesException) {
        when (e.code) {
            PurchasesErrorCode.PurchaseCancelledError -> {
                onPurchaseCancelled()
                PurchaseLogicResult.Cancellation
            }
            else -> {
                onPurchaseError(e.error)
                PurchaseLogicResult.Error(e.error)
            }
        }
    }
}

Paywall(
    options = PaywallOptions.Builder {
        viewModel.requestToDismissPage()
    }
        .setOffering(null)
        .setPurchaseLogic(purchaseLogic)
        .build()
)