Event counters not displayed correctly when reloading page

Steps to reproduce:
1. Open the Admin UI in your browser
2. Maybe reload the page (forcing full reload to prevent caching)

Actual Results:
Sometimes, the Admin UI Counters on the Events page don't work.

Expected Results:
The counters should work correctly

Workaround (if any):
Reload page until it works

Analysis:
The problem is the result of incorrect component initialization: The statsService is configured asynchronously which causes it to be used before it has been initialised.