UserAgent: Mozilla/5.0 (Windows NT 6.1; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/63.0.3239.132 Safari/537.36

Steps to reproduce the problem:
1. Create/browse to a page with an html <input type='date'> field
2. Click on the up arrow rapidly for intermittent durations without moving the mouse.

What is the expected behavior?
Each click should increase the selected value by one.

What went wrong?
When clicking repeatedly for an intermittent duration, at some point the event misfires and starts highlighting the wrong arrow, but not increasing or decreasing the value, it will continue to misfire as long as the mouse doesn't change position. (If I had to guess, the 'mousedown' event is firing in the wrong arrow control, but the 'mouseup' event is firing in the right one, making the browser think you drag-clicked)

Possibly related- if you click and hold the mouse button on the up-arrow, then move the mouse off the control (While keeping the button depressed), the highlighting will move from the up-arrow to the down-arrow.

Did this work before? N/A 

Chrome version: 63.0.3239.132  Channel: stable
OS Version: 6.1 (Windows 7, Windows Server 2008 R2)
Flash Version: