Nuki web authorization granting issues

Dear Sirs,
i am recently experiecing several problems managing nuki web authorizations. Particularly i find that new authorization emails are not sent to users whilst revoking email are always sent. I did not have this problem for many months and it started 3 weeks ago approx.

Hi @Matteo_Hary1 !

First sorry for the late reply due to the holidays:

Are the authorizations correctly created and only the emails seem not to have been sent? Or is there a general issue with creating the authorizations in general?
And you are doing it directly from Nuki Web or through the Web API?