UserAgent: Mozilla/5.0 (Windows NT 10.0; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/54.0.2840.99 Safari/537.36

Steps to reproduce the problem:
1. CTRL+P to print a page
2. Choose your desired printer (in my case, Brother MFC-9340CDW, for which I ensured its own internal two-sided printing option was to "on")
3. Click on "Advanced settings" in the Google Chrome-based print dialog box and "Two-sided printing option" is NOT there any longer

What is the expected behavior?
There should be an option to choose whether to print one-sided or two-sided pages for duplex-capable printers.

What went wrong?
Now, it's not there. :(
I have double-checked my printer's internal configuration settings and ensured "two-sided printing" was to "on," still to no avail. 

Did this work before? Yes Can't remember - I don't track my version history, but probably a month ago?

Chrome version: 54.0.2840.99  Channel: stable
OS Version: 10.0
Flash Version: Shockwave Flash 23.0 r0

Not at this time.