URL: https://www.linkedin.com/feed/

Browser / Version: Firefox 65.0.1 (64bit)
Operating System: Mac OS X 10.14.2
Tested Another Browser: Yes

Problem type: Something else
Description: Linkedin remove all the space characters when you typing with input source Vietnamese/VNI
Steps to Reproduce:

• On macOS, go Keyboard - Input Sources and add Vietnamese - VNI

• Login to personal profile on Linkedin using Firefox

• Make sure you which the input source to Vietnamese - VNI

• Write a status or a comment, and firefox will auto remove all the space character when you typing

• This bug will not happen when you typing with input source is English
  

Reported by @lmkhuyen

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