Spamming BBB Server on calendar dashboard view

Scenario:

• Create 100 planned Meetings in Coures
• Create 10 users allowed for each course
• Use the default calendar plugin
• The first view after login is the calendar view

If a user logs in, the plugin calls for every planned meeting the backend BBB server, resulting in 100+ queries per user. This results in spamming the  BBB server and a massive performance downgrade due to waiting for the finished BBB requests.