Steps to reproduce:
1. Open attached project
2. Open "Test01" scene
3. Try to move the position and rotation handles
4. Click on check box "[x] Slider?", to exclude slider
5. Move the Position or Rotation handle

Expected result: You should be able to move the handles even when the GUI sliders are enabled

Note: when an extra object is added to the scene and moved/rotated with the "slider" checkbox enabled, slider handles appear to be transformed instead of the main object.

Reproduced in: 2017.1.0a6, 5.6.0f3, 5.5.2f1, 5.4.4p4