I do not know is it a bug or a feature, but it is very annoying behavior
When pressing the spacebar to play the timeline, the screen is scrolling if to move the mouse.
I know and like the feature when you can press the space bar and hold the left mouse button to scroll the screen
but here, in the timeline without even pressing the mouse button, it is completely annoying, the screen is moving each time when you start or stop timeline preview and moving mouse
I believe it is started in the last builds