There are more than 5 active users who have the same name and it's not appearing in any Field in Manage Users
Not all users who have same name are appearing in Manage users
Reproducing the issue:
There are 8 active users named: Jesus Rodriguez in the instance but only 5 users named Jesus Rodriguez are showing in the suggestion in Manager field.
at the bottom you will see "..." tried to click it but it's not clickable.
The behavior is expected by design.
Only 5 users who has same name will show in suggestion.
1. Update the user's middle name or nick name to avoid this condition temporarily.
2. Update the customer's information by doing an employee import
KBA , user management , admin center , LOD-SF-PLT-UM , User Management , Problem