iOS IAP Restore needs few tries - ios

Question

I encounter a really awkward behavior of in app purchases in my app.
The app is a webview, so I created a webview and load my local HTML files.
Since my last update, the IAP Restore now needs several tries until it finally restores the specific product. I have 3 products and I noticed that my first IAP needs 1-2 tries until it restores, but the other 2 restore only after I try restore 3-4-5-6-7 times.
Nothing changed in restore code in the last update, and I did not find any clue anywhere in other found questions.
And a second question:
If I purchased all 3 products, should restoring one product restore all of them?
UPDATE:
Here is my code
func restorePurchases() {
NetworkActivityIndicatorManager.networkOperationStarted()
SwiftyStoreKit.restorePurchases(atomically: true) { results in
NetworkActivityIndicatorManager.networkOperationFinished()
for purchase in results.restoredPurchases {
let downloads = purchase.transaction.downloads
if !downloads.isEmpty {
SwiftyStoreKit.start(downloads)
} else if purchase.needsFinishTransaction {
// Deliver content from server, then:
SwiftyStoreKit.finishTransaction(purchase.transaction)
}
}
self.showAlert(self.alertForRestorePurchases(results))
}
}
func alertForRestorePurchases(_ results: RestoreResults) -> UIAlertController {
if results.restoreFailedPurchases.count > 0 {
print("Restore Failed: \(results.restoreFailedPurchases)")
return alertWithTitle("Restore succesful", message: "Everything was restored.")
} else if results.restoredPurchases.count > 0 {
print("Restore Success: \(results.restoredPurchases)")
var isSuccess = false
for i in 0 ..< results.restoredPurchases.count
{
let pId = results.restoredPurchases[0].productId
if pId == self.currentProductId
{
isSuccess = true
if(pId == appDelegate.pId1)
{
UserDefaultManager.setPurchaseStatus(flag: true)
self.purchaseTimer.invalidate()
}
else if(pId == appDelegate.pId2)
{
UserDefaultManager.setPicaPurchaseStatus(flag: true)
self.purchaseTimer.invalidate()
}
else if(pId == appDelegate.pId3)
{
UserDefaultManager.setPicaRealPurchaseStatus(flag: true)
self.purchaseTimer.invalidate()
}
makeJsScriptCall()
return alertWithTitle("Activated!", message: "Everything was restored!")
}
}
if(!isSuccess)
{
return alertWithTitle("Something went wrong", message: "This is the error that I get until I try restore 3-4 times")
}
func showPurchaseActionSheet() {
let alert = UIAlertController(title: "Choose Option", message: nil, preferredStyle: .actionSheet)
alert.addAction(UIAlertAction(title: "Purchase", style: .default , handler:{ (UIAlertAction)in
self.purchase(.nonConsumablePurchase, atomically: true)
}))
alert.addAction(UIAlertAction(title: "Restore", style: .default , handler:{ (UIAlertAction)in
self.restorePurchases()
}))
alert.addAction(UIAlertAction(title: "Dismiss", style: .cancel, handler:{ (UIAlertAction)in
}))
alert.popoverPresentationController?.sourceView = self.view
self.present(alert, animated: true, completion: {
print("completion block")
})
}