How to access the level blueprint instance from the master event track in sequence director (UE4 4.22)?

Since new version 4.22 when I create an event in a master event sequence (event track not attached to a specific actor), I noticed that the target pin in the sequence director representing the persistent level instance in UE4 4.21 has desepeared in UE4 4.22.

The question is : how should I supposed to trigger events present in the level blueprint (accessible from an interface) from my sequence director ?

Does it exist a way to get the persistent level instance in a different way ?