I've just started using your product (2018.1) and found this bug while testing the docking component on Windows 10 with Font and UI scaling turned on (150%).
Notice how the docking hints are missplaced. The furthest right or down the window is placed, the greater the missplacement, eventually making it imposible to reach some of the docking marks.
This didn't happen on the latest 2017.2 version which I tested before finally getting 2018.1.
Thanks and regards,