Input value is removed unexpectedly when typing with IME in Firefox.

• Type: Bug
• Status: Closed
• Resolution: Fixed
• Affects Version/s: 6.2.X EE, 7.0.0 M5
• Fix Version/s: 6.2.4 CE GA5, 6.2.X EE, 7.0.0 M5
• Component/s: Frontend Infrastructure
• Labels:
  • ee-ts
  • liferay-fixpack-portal-47-6210
• Branch Version/s:
  6.2.x
• Backported to Branch:
  Committed
• Epic/Theme:
  • escalation
• Story Points: 6
• Fix Priority: 2
• Git Pull Request: https://github.com/brianchandotcom/liferay-portal-ee/pull/9477

Issue
Input value is removed unexpectedly when typing with IME in Firefox.

Reproduction steps

1. Start bundle with Firefox browser
2. Click on create account.
3. Change to use IME input (Like sougou pinyin)
4. Type 75 characters(Chinese or Japanese) in first name filed to meet its maximum length.
5. Type 76th character with IME input.

Expected result
No addition character is inserted, previous ones remain.

Actual result
All previous characters gets deleted.