SSH keys are not loaded when database is unlocked automatically via KeePassProtectedKeyStore

[khnz]

When the KeePass database is unlocked automatically using the plugin KeePassProtectedKeyStore, KeeAgent does not load SSH keys even though the option “Add key to agent when database is opened/unlocked” is enabled.

Steps to reproduce:

1. Install KeePassProtectedKeyStore.
2. Configure KeePassProtectedKeyStore to store the database master key and unlock the database automatically.
3. Restart KeePass.
4. Open the Database, it is unlocked automatically via KeePassProtectedKeyStore.
   => KeeAgent does not load the SSH keys.

Verification:

1. Disable auto-login in the KeePassProtectedKeyStore options, but keep the entry.
2. Restart KeePass.
3. Open the database and select KeePassProtectedKeyStore as the key provider.
   => KeeAgent loads the SSH key as expected.

Any ideas how this can be fixed?

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KeePass: 2.59
KeeAgent: 0.13.8 (in Agent mode, Windows OpenSSH Agent enabled, ssh keys as ppk file as attachment)