OCSP stapling cache

Hello,
I'm facing the problem with NGINX 1.6.0 and OCSP stapling.
First request of the OCSP request is returning no response (I understand that is an known issue) and this can be fixed by running request when NGINX start, restart or reload configuration so next requests will return correct response.
However after issuing the OCSP request after more than 1 hour (cache expiration) will lead to strange functionality:
1. First request will return correct response
2. Second request will return no response

How can I overcome this issue?
Suppose I run job each hour that will make requests to NGINX OCSP stapling but in this case how can I be sure that next request will return correct response.
Moreover how can I change the functionality that first request also will return the correct response?

Thanks,
Evgeny