The issue is reproducible following these steps:
- initialize and configure Criteo SDK before asking for ATT
- All requests will report an IDFA equal to 0000-0000-.....
- Show ATT and give consent
- All requests will report an IDFA equal to 0000-0000- they basically do not update the IDFA to the new value
- A force restart of the application will show in the further request the new IDFA
Basically it seems that after SDK configuration the IDFA is store for the session and it it doesn't observe eventual variation.