With Pause Event on frame 0, sequence will never be able to resume playing. It appears to trigger the event again.
Result: Sequence will not resume playing.
Expected: Sequence resumes playing without triggering the event at frame 0 again. If you move the event to frame 1, you will get the expected result.
There's no existing public thread on this issue, so head over to Questions & Answers just mention UE-45996 in the post.