Replays start playing before the player finishes loading into the level.
From the player's point of view the replay starts playing 3 seconds into the replay instead of playing at 0 seconds.
The player is able to scrub back to the very start of the replay at 0 seconds but that is after the replay has already started playing.
The replay starts playback before the player loads into the level.
This causes the replay to start 3 seconds into the replay.
There's no existing public thread on this issue, so head over to Questions & Answers just mention UE-134367 in the post.