Freeze when playing sequence

When I play this certain sequence from blueprint in the editor the engine freezes and I have no idea why. The sequence plays perfectly well in the sequence editor. The only unique thing with the sequence that freezes my engine is that it has an event track so that it will be able to trigger blueprint events.

are you that the engine freezes? maybe only sequencer stops, if so this is a known bug link text

The whole engine froze. Solved it by deleting the sequence and remade it from scratch.