Payment through Stripe iOS SDK can never complete

[phoboslab]

(Sorry for opening this issue here. I can't find a proper way to report a bug for the web flow)

When initiating a Klarna Payment through the iOS Stripe PaymenSheet and choosing "pay by bank" Klarna attempts to open a new tab for the banking login in the in-app-browser, which does not succeed. Instead, you're redirected in the same tab. After the banking login you're stuck on a "please close this tab" screen (see attached). You can only close the whole window which cancels the payment.

This problem appeared for our customers a few weeks ago. I believe there have been some changes on your (Klarna's) side, causing this. It may only be related to certain banks. For what it's worth, I can reproduce the issue 100% with N26.

Many users can not complete the payment or approve the payment (out of band) in their banking app, which will not notify Stripe and finally results in a "Technical problem with your payment" email from Klarna.

I realise that this is an issue with the Stripe PaymenSheet and their in-app-browser, but I believe the root cause is that Klarna tries to open a new tab - which, even if it works in a browser - is utterly confusing.

Same issue in Stripe-iOS SDK: stripe/stripe-ios#4356

Happy to share a complete video recording of the bug privately.

[NMGuner]

Hi @phoboslab, although this is not an issue about our SDK I notified the teams owning this part of the purchase flow internally to notify here once they have an update regarding this issue you are facing with the Stripe SDK.