When playing a replay with DemoPlayTImeDilation set to 5, and jumping around the timeline using GotoTimeInSeconds(), the play back can break, with game actors freezing and violently shaking. It seems the replay streamer gets out of sync with the playback causing UDemoNetDriver::PauseChannels() to be called. (See UDemoNetDriver::TickDemoPlayback() line 3876.
the user can fix it by pausing and playing at normal speed
There's no existing public thread on this issue, so head over toAnswerHub just mention UE-89179 in the post.