Request scope objects are acting like singleton .Net Core 2.1

[entith]

The fix for issue #50 is no longer sufficient in ASP.NET Core 2.1.

It looks like IHttpContextAccessor is no longer registered with the DI container by default because maintaining [its] state has non-trivial performance costs":

• https://stackoverflow.com/a/38186047
• https://github.com/aspnet/Hosting/issues/793#issuecomment-380762239

Quick fix is to register it manually:

services.AddHttpContextAccessor();