Until that happens there is little hope for a usable mobile node 😪
Discussion
Hard disagree? When you are showing someone the invoice, just leave the app open
Then we have different definitions of good UX. What you suggested is a huge compromise.
Huge comprise is keeping an app open for 5 seconds? A bigger comprise is giving up custody and privacy.
You can't text/email/DM someone an invoice for them to pay later.
Your compromise is fine for a point-of-sale but not everything else.
