UserAgent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_13_3) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/64.0.3282.186 Safari/537.36

Steps to reproduce the problem:
1. Install an application like lastpass with Popup UI
2. Enter a keypress in an input field
3. Notice the key you pressed being repeatedly seen on the input field.

What is the expected behavior?
If you press a single key, it should only register a keyup event once. (If you press 'a' then only a should be seen)

What went wrong?
If you press a character 'a',  keyup events are triggered infinitely thus filling the input field with 'aaaaaaaaa.....'

Did this work before? Yes 64.0.3282.186

Chrome version: 67.0.3366.0  Channel: canary
OS Version: OS X 10.13.3
Flash Version: