First attempt to connect with StartTLS and 'Always Trust' fails

When I try to make the first connect to the ApacheDS using StartTLS the `Certificate Trust` window pop-ups (See the attachments).
If I click on `Always trust this certificate` and `OK` button immediately everything works as expected. But if I am waiting for 5-10 seconds and do the same actions the error occurs.
However, after that the certificate goes to the trusted and next connections are going well.
It is a stable reproducing (I played with removing trust certificates and re-connection)

Regards,
Oleksandr