To reproduce:
1. Open attached Unity project "TimelineLinkedBug.zip"
2. Open "test" scene
3. Open Timeline and Animation windows
4. Click on "New Timeline" in the hierarchy
5. In the Timeline window, right click on "Cube" timeline and click "Edit in animation window"
6. In animation window, press "," and "."

Expected result: pressing "," and "." should navigate left and right through frames in the animation window
Actual result: pressing "," and "." navigates to random frames, eventually getting out of bounds and prompting "ArgumentOutOfRangeException" error (see attached gif "TimelineKeyframes.gif")

Reproduced on: 2017.1.0f3, 2017.2.0b2