Safari bug

Hello, I have a strange bug in Safari 5.2 browser. The plugin works perfect in all other browsers, but in safari it does not work. There is no animation and i jumps trough the pages (again no animation), there is no highlight too. The plugin is loaded I checked and there is no console errors. I have to say that the demo is working just fine, but in wordpress there is that bug. Do you know how to fix it ?

https://ww.wp.xz.cn/plugins/page-scroll-to-id/