24.sp-pages-mobileupsellview.js taking a long time to load in SharePoint 2019 page

Conducting some performance testing on a SharePoint 2019 site we noticed one resource taking about 7 seconds to complete its loading. The resource "24.sp-pages-mobileupsellview.js" appears to enter a waiting period before it finishes. This appears in a stock SP 2019 site with no customization on it. There isn't anything published about this script file. Does anyone know what this file is doing and why it takes so long to complete?