This is not a regression.
Actors move around between keyed points in a Sequencer while Zooming in/out of the Timeline if a Cine Camera is possessed in the Sequencer.
The Time line zooms in and out but the scene doesn't change.
The Keyed actor in the scene moves around between keyed positions while the Time Line is zooming as if it is being scrubbed.
There's no existing public thread on this issue, so head over to Questions & Answers just mention UE-168137 in the post.