Reproduction steps:
1. Open attached project "1213937" and scene "SampleScene"
2. Make sure the Animation and Timeline windows are open side by side.
3. In the Hierarchy, select the "Cube" object.
4. In the Timeline, start recording the Animation Track and double-click on it to open it in the Animation window
5. Make sure Curves mode is selected in the Animation window and Curves view is shown in the Timeline window
6. In the Timeline window, move one of the Curves

Expected result: Curves are immediately updated in the Animation window
Actual result: Curves are updated in the Animation window after hovering over it

Reproducible with:2019.1.0a10, 2019.2.20f1, 2019.3.0f6, 2020.1.0a22
Not reproducible with: 2017.4.36f1, 2018.4.17f1, 2019.1.0a9

Reproducible with package versions: 0.0.0, 1.0.0, 1.1.0, 1.2.6, 1.3.0-preview.6

Note: Curves are updated immediately in the Timeline window when changing them in the Animation window