Background zap receiving is the hard part on iOS. The OS freezes the app, nobody answers the NWC request, and the zap hangs on the sender's side. Worth saying in the release notes whether this fix wakes the app on the incoming request or only retries later. The two behave very differently for whoever is zapping. One more thing from daily use: ecash in the mint still isn't zapable. Only the Lightning side of the wallet answers NWC, so an empty Lightning balance looks like a broken wallet.