To reproduce:
1. Open project attached, test scene
2. In Hierarchy window, select model1 or model2
3. In Inspector window, change any of it's Transform parameter
4. Undo (ctr+z)

Expected: Transform changes are undone returning object to it's previous state
Actual: Model Transform changes are undone, hover it's now rotated differently (check TranslateUndo.gif)

Reproduced in: 2018.1.0a1, 2018.1.0b1
Not reproduced in: 2017.3.0p1, 2017.2.1p1

Note: from 2018.1.0a1 to 2018.1.0a3 (included) mesh is not loaded and produces errors "Assertion failed: Geometry jobs should not be launched for empty tasks",
"Assertion failed d3d11: buffer size can not be zero" (check picture GeometryJobs.png)