Repro Steps:
1) Create a button template with a couple layers within.
2) In the Visual States panel, press the 'Record' animation button add a Render Transform animation to the MouseOver visual state by selecting a point in the timeline, clicking on the '3-dot' menu for the X-Axis adjustement, and select 'Create Keyframe'.

Observe the application crashing.

Note that this crash does not occur, if the transform is created by placing the playhead at the desired point on the timeline, and then simply editing the value with recording turned on.

Expected Result:
A keyframe for the Render Transform property appears on the timeline without crashing.