To reproduce:
1. Open my attached project
2. In Hierarchy window, select Cube game object
3. In Timeline window, move the cube's animation marker somewhere other than first frame
4. Enable Record mode
5. In Inspector window, try changing the transform's scale values

Expected: scale is changed according to object's pivot, located in the center
Actual: scale is changed according to pivot which is currently seem to be located in the original object's location (at first frame)

Reproduced in: 2018.2.0a1, 2018.2.0a4
Not reproduced in: 2017.3.1p4, 2018.1.0b10

Note1: check .gif attached to understand the issue if unclear
Note2: error "Invalid worldAABB. Object is too large or too far away from the origin.
UnityEngine.GUIUtility:ProcessEvent(Int32, IntPtr)" is thrown, when changing the scale. Check .png attached for more errors produced by scale change