.Net Core 2.2 Cookie Authentication Problem

I hope this helps . At start remove doubled comma in Response.Cookies.Append and will work (but you need to be on /user path to see that cookie)

it fixes the issue In this setup there is nothing stored on the server. The cookie contains the full serialized, encrypted ClaimsPrincipal and AuthenticationProperties.
There is a reference mode that works like you described that can be used if the identities are too large. In that case yes you do need to set up a data store. No default implementations are provided. https://github.com/aspnet/Security/blob/5b29bced0d2f1cfc78843bcd9ec9a828c6fb5fef/src/Microsoft.AspNetCore.Authentication.Cookies/CookieAuthenticationOptions.cs#L138

I hope this helps you . The persistence granted by IsPersistent is, according to the docs, only meant to imply that the authentication will persist through browsing sessions (that is, it is kept even when the browser is closed). You need a combination of Persistence and to set an expiration time for the cookie. The expiration of the cookie can be set via the CookieAuthenticationOptions (MSDN), using the ExpireTimeSpan option.
Without persistence, expiration of the authentication can be set using the ExpiresUtc option in AuthenticationOptions,

this will help You can have both Cookies and JWT authentication at the same time in one project. first add both cookie and JWT authentication in ConfigureServices method:

services.AddAuthentication()
  .AddCookie(options => options.SlidingExpiration = true)
  .AddJwtBearer(options =>
  {
    // JWT setup
  });

[Authorize(AuthenticationSchemes = JwtBearerDefaults.AuthenticationScheme)]

seems to work fine After more digging, I stumbled on this thread, which answered my question.
I had misunderstood how authentication works in an asp.net core app that uses identity. When you use Identity to authenticate and login a user, the default authentication scheme used is called "Identity.Applicaiton" and not "Cookies".

var result = await _signInManager.PasswordSignInAsync(loginModel.Email, loginModel.Password, true, false);

                if (result.Succeeded)
                {
                    return LocalRedirect("/home/index");
                }

var claims = new[]
                {
                    new Claim("email", user.Email),
                };
                var identity = new ClaimsIdentity(claims, CookieAuthenticationDefaults.AuthenticationScheme);
                await HttpContext.SignInAsync(CookieAuthenticationDefaults.AuthenticationScheme,
                    new ClaimsPrincipal(identity));