UserAgent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/60.0.3112.50 Safari/537.36

Steps to reproduce the problem:
1. localStorage.setItem('test' + 123, "ok");
2. localStorage.hasOwnProperty('test' + 123);

What is the expected behavior?
Version 59.0.3071.115

localStorage.hasOwnProperty('test' + 123);
return true;

What went wrong?
Version 60.0.3112.50 (Official Build) beta (64-bit)

localStorage.hasOwnProperty('test' + 123);
return false;

Did this work before? Yes 59.0.3071.115

Chrome version: 60.0.3112.50  Channel: beta
OS Version: 10.0
Flash Version: