Hey Sander, 😃
I see what you mean right there, and I just added this to our wishlist! 👍
This is indeed a design choice, but we'll let you know if anything changes for a different flow. For now, you can always tap on the bank account you want to send the payment from, and only then tap on the 'Pay' button. This way, the payment will be sent form the account you previously selected, and you won't have to adjust the 'from' account in the last second payment screen! 🎉