Upgrading from DXP 7.0 to DXP 7.1+ results in pages that previously had the 1-2-1 column layout having no layout selected. When placing widgets onto the page it behaves as though the 2 Column (30/70) layout is in effect (this is the default to my understanding).
1. Bring a clean Liferay DXP 7.0 de-80 bundle online
2. Create 9 pages each with a different default layout including the 1-2-1 layout
3. Upgrade the database to Master
Expected Result: The 1-2-1 layout will still be used
Actual Result: The 1-2-1 layout is no longer applied to pages it previously was
None. The upgrade completes without issue.