Client said he is using Samsung Nexus tablet.
There is simple list and onClick event it opens subsections. Like this:
When you click on London or on any red submenu browser does some zoom.
So if anyone could explain what it is I would be grateful. And if it can be somehow disabled using some meta value or JS.
You cannot disable this.
If you click a link that is very close to another link the browser will do this so you can tap the one you actually want.
Many (myself included) like it this way.