Fallback to password doesn't show password prompt

[makkes]

Describe the bug

When the Touch ID dialog opens and I click on "Use Password...", no password prompt opens and GPG says "gpg: signing failed: No passphrase given".

Steps to reproduce:

1. Run echo 'hello, world!' | gpg -as
2. In the Touch ID dialog click on "Use Password..."

System information

macOS

• Architecture: M3 Pro
• Version: 14.5

GPG

• Output of gpg --version:

  gpg (GnuPG) 2.4.5
  libgcrypt 1.10.3
  Copyright (C) 2024 g10 Code GmbH
  License GNU GPL-3.0-or-later <https://gnu.org/licenses/gpl.html>
  This is free software: you are free to change and redistribute it.
  There is NO WARRANTY, to the extent permitted by law.
  
  Home: /Users/max/.gnupg
  Supported algorithms:
  Pubkey: RSA, ELG, DSA, ECDH, ECDSA, EDDSA
  Cipher: IDEA, 3DES, CAST5, BLOWFISH, AES, AES192, AES256, TWOFISH,
          CAMELLIA128, CAMELLIA192, CAMELLIA256
  Hash: SHA1, RIPEMD160, SHA256, SHA384, SHA512, SHA224
  Compression: Uncompressed, ZIP, ZLIB, BZIP2
  

• Installed via Homebrew? yes

Configuration

gpg:OpenPGP:/opt/homebrew/Cellar/gnupg/2.4.5/bin/gpg
gpgsm:S/MIME:/opt/homebrew/Cellar/gnupg/2.4.5/bin/gpgsm
keyboxd:Public Keys:/opt/homebrew/Cellar/gnupg/2.4.5/libexec/keyboxd
gpg-agent:Private Keys:/opt/homebrew/Cellar/gnupg/2.4.5/bin/gpg-agent
scdaemon:Smartcards:/opt/homebrew/Cellar/gnupg/2.4.5/libexec/scdaemon
dirmngr:Network:/opt/homebrew/Cellar/gnupg/2.4.5/bin/dirmngr
pinentry:Passphrase Entry:/opt/homebrew/opt/pinentry/bin/pinentry

Logs

$ echo 'hello, world!' | gpg -as
gpg: signing failed: No passphrase given
-----BEGIN PGP MESSAGE-----

gpg: signing failed: No passphrase given

gpg-agent:

gpg-agent.log

pinentry-touchid:

2024/07/31 18:44:38 main.go:118: Ready!
2024/07/31 18:44:39 main.go:348: Failed to authenticate