Second unexplained pinentry when generating subkeys with GPGME

[Jacob Adams]

When generating a new GPG master key and some subkeys with GPGME I
noticed some odd behavior. I get a second passphrase pinentry when
generating the first subkey and I don't know why. I initially thought it
was for creating the automatic revocation certificate, as it doesn't
seem to happen if I suppress the creation of the automatic one by
generating my own directly. However, the revocation certificate exists
before these passphrase prompts.

Does any know what might be happening here?

Thanks,
Jacob

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