Is there a team size limit for Manager Self Service (MSS) functions?

Summary:

Is there a team size limit for Manager Self Service (MSS) functions? We have a handful of managers with teams of 1000+ people.

Content (please ensure you mask any confidential information):

Although most of our managers have teams of 2-20 people, there are a handful of people with teams of hundreds — or in some cases, thousands — of people.

In particular, there is one manager with a team of 3,200+ people who would like to use the Team Absences function. When she selects that icon, a new tab opens up and nothing happens. I assume this is Fusion choking on the size of the team? I am able to reproduce the same situation in test pods.