What is the version of Chrome (chrome://settings/help)?
Version(exact): Version 65.0.3325.181 (Official Build) (32-bit)

What is the OS Version?
Windows 10 Enterprise, 64-bit 

What are the steps to reproduce the problem?
1. Set Screen resolution 1920x1200 and Size scaling of items: 125%
2. Open the JSBin sample:
   https://jsbin.com/xunigopate/edit?output 
3. A textarea is displayed

What is the expected behavior?
The textarea has a right border

What is the experienced behavior?
With the display settings given above (Screen resolution 1920x1200 and Size scaling of items: 125%) the right border of the text area is not visible

Has the experienced behavior changed?
No

(If so) In what prior version of Chrome was the behavior as expected?

Is the experienced behavior different in other browsers?
No.

Any other comments? 
Also using: Version 65.0.3325.181 (Official Build) (64-bit).