@GossiTheDog
iecvlist is afaik used to load compability lists for IE (probably also IE mode). I don't think this will have a big (if any) impact.
There's a GH issue to report problems with ajax.aspnetcdn.com if you want: https://github.com/dotnet/AspNetCore.Docs/issues/34049
Also the documentation (https://learn.microsoft.com/en-us/aspnet/ajax/cdn/overview) states: "The Microsoft Ajax CDN has no SLA above and beyond using an Azure CDN."