Issues with SharePoint Product Catalog (Classic)

Is it a known issue for search-based web parts (content search web part or search box, refiners and results) to be interfering with a page layout integrated with catalog item reuse snippets in SharePoint Online (classic)? 

Due to the limitation in creating a product catalog site in modern experience, we went down the path of creating a classic version of product catalog in SharePoint Online.  For a year and a half, the product catalog has been working fine until recently while there were no new changes made to the page or the page layout.  The page used to surface catalog item content based on the product tag in the URL (https://[tenantname].sharepoint.com/sites/products/overview.aspx?myproduct=apple) as well as search-based content.

Upon investigating the issues, it appears that the catalog item reuse snippets on the page layout and the search-based web parts both are interfering with each other's.  If we removed search-based web parts from the page, the catalog item content then surfaces.  If the search-based web parts are re-added, the catalog item content then disappears.  Has anyone experienced this issue?