OCSP Stapling Globalsign configuration

Hi, Before activating Ocsp stapling on the F5, i see two request to ocsp2.globalsin.com when i try a connection to my site: - the first :for root r3 - the second: for extended certificate

 

After activating Ocsp stapling on my F5, i have still the first request (root-r3)

 

I don't understand because the chain for the ocsp stapling profile contains the intermediate (extended ssl) and the root -r3, i suppose i have to add a certificate in the chain, but not sure and which one

 

thanks,