On changing terrain, resolution length or width trees position is not synchronizing on another terrain using same terrain data in the same scene or additive scene

Steps to Repro:
1. Open attached or create a new project
2. Hierarchy window > right click
3. 3D object > terrain
4. Duplicate terrain
5. Inspector > paint trees
7. Edit Tree > add tree
8. Paint trees on the 1st terrain
9. Observe that the trees are getting painted on 2nd terrain as well
10. Inspector > terrain setting
11. Under resolution change length or width

Actual Result:
1. Trees position is changed to match terrain dimensions on 1st terrain
2. Trees position remain same on the second terrain even though the base dimensions are changed
3. Position resets when terrain data is refreshed

Occurring with:
2018.3.01, 2018.2.0b4, 2018.1.0f2, 2017.4.3f1, 2017.2.2f1, 2017.1.3p3

Environment:
Windows and Mac