WARN message in portal console after changing portal language to RTL languages

• Type: Bug
• Status: Closed
• Resolution: Won't Fix
• Affects Version/s: 7.2.X, Master
• Fix Version/s: None
• Component/s: RTL Infrastructure
• Labels: None
• Fix Priority: 2

Steps to Reproduce:

1. Start up a clean portal.
2. Add Language Selector in a page.
3. Change language to Arabic.

Expected Results:
No WARN message in console.

Actual Results:
Below WARN message display in console:

2020-07-22 05:56:28.409 WARN  [http-nio-8080-exec-8][CSSNodeToDomainObject:895] Media expression uses unknown feature 'prefers-reduced-motion'
2020-07-22 05:56:28.411 WARN  [http-nio-8080-exec-3][CSSNodeToDomainObject:895] Media expression uses unknown feature 'prefers-reduced-motion'

Reproduced on:
Tomcat 9.0.33 + MySQL 5.7. Portal master DXP GIT ID: 21b2adc009b50747fa2512a77308e78001e6b13f.
Tomcat 9.0.33 + MySQL 5.7. Portal 7.2.x DXP GIT ID: 66cea73d9c802987a4f8b4f803037e5ad3e7dac7.