gpg2: unable to use secret key from OpenKeychain

[justina colmena]

Subject: secret key data (test key)
Date: 2018-12-07

This attachment is an encrypted backup I made from the OpenKeychain app of a test key I made for the purpose. The passphrase for this one is

5101-2272-0596-2716-2013-3210-0535-7592-9890

but it looks like the whole thing is encrypted by symmetric-key (AES-256) cipher because it is not encrypted to any particular public key, and furthermore, once decrypted and imported, the secret key is no longer protected by a passphrase, until I explicitly create one for it with "gpg --edit-key".

For some odd reason I am unable to use the secret key in gpg2 (~2.2.11), even though I can still encrypt to the imported key or verify signatures with it in gpg2.

There does not seem to be any problem with using the secret key in "gpg" = GnuPG 1.4.23.

$ gpg --decrypt backup_2018-12-07.sec.pgp | gpg --import
gpg: unknown armor header: Passphrase-Format: numeric9x4
gpg: unknown armor header: Passphrase-Begin: 51
gpg: AES256 encrypted data
gpg: encrypted with 1 passphrase
gpg: key CAC8E3E7: public key "Test Key 1 <test-key-1 at example.com>"
imported
gpg: key CAC8E3E7: secret key imported
gpg: key CAC8E3E7: "Test Key 1 <test-key-1 at example.com>" not changed
gpg: Total number processed: 2
gpg: imported: 1 (RSA: 1)
gpg: unchanged: 1
gpg: secret keys read: 1
gpg: secret keys imported: 1
$

-----BEGIN PGP PUBLIC KEY BLOCK-----

mQGNBFwKeG8BDAClaZu5lcIM12biCt7tyoddrwFl/UwERhfVMqZccMXrF+puP+0I
FsVvV/EqI+tOhYLepOmCj9KfGQ0KFi/UtElbMZma7WFuDu/mVh+Hrl2wVbqSjR8u
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ThlRvnZJ/htBWA==
=rOgB
-----END PGP PUBLIC KEY BLOCK-----

-- 
A well regulated Militia, being necessary to the security of a free State, the right of the people to keep and bear Arms, shall not be infringed.

https://www.colmena.biz/~justina/justina.colmena.asc
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