In the workflow, the system does not send an email to an assigned user when the status changes.

Íme a fordítás:

One of our users reported that they are not receiving email notifications when they are assigned a task after a status change. This is particularly interesting because they receive notifications in several vaults, but not in one. Their email address is correctly set up, the assignment is also happening, and I couldn't find anything in the advanced settings that would block the notifications. Additionally, it's only this one user who is not receiving the emails, and only in this one vault.
Could you help me find where the settings for these email notifications are?

Or what yould be behind this strange case?