Two success banners appear after adding a new page

• Type: Bug
• Status: Closed
• Resolution: Fixed
• Affects Version/s: 7.0.X
• Fix Version/s: 7.0.0 DXP FP59, 7.0.0 DXP SP9, 7.0.X
• Component/s: Frontend Infrastructure
• Labels:
  • 7.0.x-only
  • ee-7.0.x-only
  • ee-ts
  • liferay-dxp-70-sp9
  • liferay-fixpack-de-59-7010
• Branch Version/s:
  7.0.x
• Backported to Branch:
  Committed
• Story Points: 0.25
• Fix Priority: 3
• Git Pull Request: https://github.com/liferay/liferay-portal-ee/pull/9801

Reproduce
1. Start up Liferay
2. Add a new page

Expected Result: A single success banner appears.

Actual Result: Two success banners appear.