Unexpected tab selection


I don’t know that only happens to me or everyone but when I start to select the tabs with mouse, a strange thing is happening.

In a tab;
0% - 50%: tab is selectable
51% - 99%: tab isn’t selectable
100%: tab is selectable

This is what happens in Sublime:

And this is what happens in Atom:

It happens in safe mode, too. And I guess when I first installed the Atom 2 years ago, same thing was happening, too.

atom --version
Atom : 1.18.0
Electron: 1.3.15
Chrome : 52.0.2743.82
Node : 6.5.0

apm --version
apm 1.18.1
npm 3.10.10
node 6.9.5 x64
python 2.7.12
git 2.9.2