[UI Elements] "Array element out of bounds" exception thrown on undoing or redoing a change in float array field. Refer to the video attached.

Steps to reproduce:
1) Open attached project.
2) UIE Test Suite > Open FTP
3) Bindings > Properties
4) Float array field > Change size to 10
5) Press Ctrl+Z

Actual result: IMGUI field does not change to original state and "Array element out of bounds" exception is thrown
Expected result: IMGUI field changes to original state and no exception is thrown.

Occurs on: 2019.2.0a10, 2019.1.0b9
Note: The project has been made using 2019.1.0b9

Stack trace:
Retrieving array element that was out of bounds
UnityEditor.RetainedMode:UpdateSchedulers()