[OCSP Stapling] Globalsign configuration

Hi everyone, My objective is simple : I want to set OCSP Stappling configuration on my HTTPS VIP.

For that, I follow this article

For information, Globalsign is my SSL provider and I have wildcard certificate.

For test, i create in /tmp a folder that contant 4 files :

root_ca.pem --> root certificate off Globalsign inter_ca.pem --> Intermediate certificate off Globalsign chain.pem --> Concatenation off root_ca.pem and inter_ca.pem server.crt --> My server certificate (set in ssl profile on my HTTPS VIP)

If I follow the article :

openssl verify -CAfile chain_ca.pem server.crt 
server.crt: OK
`

`openssl ocsp -issuer inter_ca.pem -cert server.crt -text -header "HOST" "ocsp2.globalsign.com" -url http://ocsp2.globalsign.com/gsorganizationvalsha2g2 -CAfile chain_ca.pem`

`Response verify OK
server.crt: good
    This Update: Oct  3 15:33:38 2018 GMT
    Next Update: Oct  7 15:33:38 2018 GMT
`

Here, all is OK.

Then, I configure a DNS Resolver (respond to dig request)

Here is my OCSP Config :

Finally configure OCSP Stapling profile on my SSL profile

So, here is the problem :

`openssl s_client -connect mysite.com.com:443 -tlsextdebug -status | grep -i "ocsp response" -B 5 -A 10
depth=2 C = BE, O = GlobalSign nv-sa, OU = Root CA, CN = GlobalSign Root CA
verify return:1
depth=1 C = BE, O = GlobalSign nv-sa, CN = GlobalSign Organization Validation CA - SHA256 - G2
verify return:1
depth=0 C = FR, ST = HAUTS-DE-SEINE, L = BOULOGNE-BILLANCOURT, O = Mycompany, CN = *.mysite.com
verify return:1
CONNECTED(00000003)
TLS server extension "renegotiation info" (id=65281), len=1
0001 - 
OCSP response: no response sent
---
Certificate chain
 0 s:/C=FR/ST=HAUTS-DE-SEINE/L=BOULOGNE-BILLANCOURT/O=Mycompany SA/CN=*.mysite.com
   i:/C=BE/O=GlobalSign nv-sa/CN=GlobalSign Organization Validation CA - SHA256 - G2
 1 s:/C=BE/O=GlobalSign nv-sa/CN=GlobalSign Organization Validation CA - SHA256 - G2
   i:/C=BE/O=GlobalSign nv-sa/OU=Root CA/CN=GlobalSign Root CA
---
Server certificate
-----BEGIN CERTIFICATE-----
MIIFXjCCBEagAwIBAgIMC5i5tRV4nZMVggsYMA0GCSqGSIb3DQEBCwUAMGYxCzAJ


The problem is than no DNS request is made by F5 (tcpdump is empty). And no access request is made to ocsp2.globalsign.com
F5 is in version 12.1.1 build 2
As anyone to try this with Globalsign ? 
Thanks a lot or your help