SignRequest not validated after signing

Hi all,

I create an application and I use private / public key for authenticate.

I use .net sdk to upload a file, create a sign request to 1 email and everythinks works fine.
After that I recieved the email to sign the document and I can sign it, but after signing the document the sign request is never validated.

I don’t have any other emails about errors.
Is there a way to have the sign request status ?

I try to do the same process manually and it’s work.
Did I miss something ?