Items do not arrive in the mail

The mails of the game do not arrive immediately, for example: in the mission to free the slaves (kalthertz) when they are freed the mail does not arrive. Another example, the market, when buying materials/engravings the gold is spent but the mail does not arrive. The mail has sometimes arrived when I restarted the game but not all of it and it doesn’t always work.

On the other hand I thought it would be because of Steam Guard Mobile but I have it active