incorrect position detection when editing samples

[zxcygnus]

I tried edit samples on some places, but it is changing samples on very different places from where i clicked. For example half of screen different. I don't know if it can be because i am trying it on older notebook with small display resolution - only 1280x800px (with W10).

It worked better, when i zoomed in, to the state where nodes are visible and then clicked preciselly on the node. But anytime i clicked only slightly outside the node, node which was selected last time was moved instead nearest node.