UserAgent: Mozilla/5.0 (Windows NT 10.0; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/52.0.2743.82 Safari/537.36

Example URL:
http://plnkr.co/edit/NPasq5CkStJdCRbEHPuQ?p=preview

Steps to reproduce the problem:
the test case in the plnkr should be self-explanatory. Here are the manual steps:
1. Create a range input with a step value of 10
2. Change the input value to 5 (via element.value) // value changes to 10 because of step 10
3. Change the step attribute to 6

What is the expected behavior?
The value should now be 12.

What went wrong?
The value is still 10, and the stepMismatch error is set = true

Does it occur on multiple sites: Yes

Is it a problem with a plugin? No 

Did this work before? N/A 

Does this work in other browsers? Yes 

Chrome version: 52.0.2743.82  Channel: stable
OS Version: 10.0
Flash Version: Shockwave Flash 22.0 r0

subsequent changes to the step attribute also cause no value change.
This works as expected in FF 47.0.1 and Edge 25.10586