Since this affected only one client and it's more likely than not a lawful intercept, it's not a compromise.
In hacking, compromised means hacked.
In intelligence, compromised means you have someone doing something on your behalf that they feel forced to do.
You seem to understand this so I'm not sure where the confusion lies.
Since this affected only one client and it's more likely than not a lawful intercept, it's not a compromise.