Thanks for the suggestion, I might do.. wanted to avoid NFC though.. do you know if the method of adding the key is relevant for later wallet use? I.e. if I add the key via NFC, do I have to use NFC later or can I still sign via QR?
Discussion
Nope, you have All options available to you at every step when you add the key and when you sign your PSBT. QR should work fine when you're signing. But of course I don't know what the issue is. So it might have an issue with signing as well.
Ah, good to know - then I'll try NFC. Thanks for clarifying!