Unable to disable Signature verification in Adobe Reader

I have to affix digital signature using DSC separately on multiple pages of a pdf. Everytime I sign using the DSC, it starts verifying the digital signature. This step of verification takes a lot of time.

Even if I disable  Edit - Preferences - Signatures and click on More next to Verification, and then tick off the "Verify signatures when the document is opened' box, the verification continues everytime.

Please advise how to disable signature verification eveytime the signature is affixed.