I can duplicate this behaviour.

The arrows in the window advance about 3 beats in either direction. The arrows on the keyboard advance 1 beat in either direction.

Shift-Left or Shift-Right move the cursor to the beginning of the track.


Desktop; i7-2600k, 8 GB mem., Win 10 Pro, BIAB 2017; RB 2017 - latest build
Laptop: i5-2410M, 4 GB mem, Win 10 Pro, BIAB 2017; RB 2017 - latest build