若在ASP.NET Core中使用代理服务器，则可能会遇到此问题。在这种情况下，您需要确保使用"UseForwardedHeaders"中间件，并在添加OpenIdConnect时将authority选项设置为当前主机地址，而不是代理服务器地址。示例代码如下所示：

public void ConfigureServices(IServiceCollection services)
{
   // ...
   services.AddMvc();

   // Add authentication with OpenIdConnect
   services.AddAuthentication(options => {
      options.DefaultScheme = CookieAuthenticationDefaults.AuthenticationScheme;
      options.DefaultChallengeScheme = OpenIdConnectDefaults.AuthenticationScheme;
   })
   .AddCookie()
   .AddOpenIdConnect(options =>
   {
      options.Authority = "https://current-host-address/";
      options.ClientId = "your-client-id";
      options.ClientSecret = "your-client-secret";
      options.CallbackPath = "/signin-oidc";
      // ... other settings
   });

   // Use forwarded headers middleware to set the correct host address
   app.UseForwardedHeaders();
}