Stunner - When append a new node even a small move will lead to node misplace

When I append new nodes sometimes node is placed a bit below instead of the center of previous node, see image below:

It happens more often when I am using touch pad instead of a mouse. Looks like it is caused by a very small movements be during the click (press mouse, move it a bit, release mouse button). It can be prevented by not handling tiny moves during new node creation.