Sort by "New Items" isn't working properly

• Type: Bug
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 2.1.0
• Fix Version/s: 2.1.0
• Component/s: Shopping Experience → Widgets
• Labels: None
• Git Pull Request: https://github.com/marco-leo/liferay-portal-ee/pull/299

Steps to reproduce (7.1 + dxp-15 + Commerce 2.0.7):

1. Create a minium site.
2. Create a new product.
3. Go to the site and choose to sort the products by "New Items".
Result: You do not see the newly added product.
(see atatched short video made by our consultant on-site)

Note: I could only reproduce this after I added a second new product.