'Decision' reads email: how (when) is this evaluated?

Your software
My Mautic version is: 4.4.11
My PHP version is: 8.2
My Database type and version is: tidb

Your problem

Not so much a problem as a question.
If i have a campaign that uses ‘reads email’ decision… If i attach that to a send-email, it appears the ‘has not read’ decision is taken immediately, and, later, when the user does read it,it then also takes the ‘has read’ path.

At what point in time is this decision evaluated? How can i make it take only one path? e.g. how can i say “If after 2days they have not read, take this path, and never take the other even if they later read it on day 3”?