Wiki can't add content for FrontPage

• Type: Regression Bug
• Status: Closed
• Resolution: Fixed
• Affects Version/s: 7.0.0 DXP SP2, Master
• Fix Version/s: 7.0.0 DXP FP10, 7.0.0 DXP SP2, 7.0.3 CE GA4, 7.1.X, Master
• Component/s: Collaboration, Collaboration > Wiki, Frontend Infrastructure > WYSIWYG
• Labels:
  • Frontend
  • QA-AUTOMATION
  • liferay-digital-enterprise-70-sp2
  • liferay-fixpack-de-10-7010
• Branch Version/s:
  7.0.x
• Backported to Branch:
  Committed
• Fix Priority: 4
• Browsers:
  Firefox (latest), Internet Explorer 11
• Sprint: Tetraferriphlogopite 12/20-1/3, Uranothorite
• Git Pull Request: https://github.com/brianchandotcom/liferay-portal/pull/45836
• QA Test Name:
  • SearchUsecase#SearchAssetsScopeEverythingAcrossMultipleSites
• QA Test Score: 4

Steps to reproduce:

1. After cleaning browser recent history,sign in as an admin.
2. Add a wiki portlet to a page.
3. Click the link 'This page is empty. Edit it to add some text.' and add content for the FrontPage.

Expected Result:
You can add a new content for FrontPage.

Actual Result:
Can't edit in FrontPage.

Note:
On master,the first time you add text it work well but if you refresh the page or click cancel and add again,then you can't edit anymore.This issue only affect on Firefox(latest) and IE11,Chrome is fine.