ASP.NET Core Claims not being fetched properly - asp.net-core

Question

I'm building an app in ASP.NET Core 3.1 with Entity Framework Core 3.1 and am having some trouble debugging Authorization. Currently, I'm working on Claims-Based Authorization, as the code samples below will illustrate.
In the AdminController:
public async Task<IActionResult> EditUser(string id)
{
var user = await _userManager.FindByIdAsync(id);
if (user == null)
return RedirectToAction("UserManagement", _userManager.Users);
var claims = await _userManager.GetClaimsAsync(user);
var vm = new EditUserViewModel()
{
Id = user.Id,
UserClaims = claims.Select(c => c.Value).ToList(),
Email = user.Email,
UserName = user.UserName,
Birthdate = user.Birthdate,
City = user.City,
Country = user.Country
};
return View(vm);
}
This function is called when I click on the Edit button next to a user in the Admin section of the app. The problem I'm having lies with the claims. I have the ability to add claims to a user, but somewhere in the code it isn't working correctly. When debugging, everything seems to work, and the database table AspNetUserClaims does contain the correct data after adding the claim to the user, but the function above has a bug in it that I'll try to describe.
Basically, on the EditUser View page, there should be an HTML ul of all claims the current user has. Even after adding claims to the user, though, no ul of claims displays. When debugging, I found that the problem seems to be in the EditUser code above, because the var claims is set to Count=0 after calling GetClaimsAsync(user). This value of Count=0 is then passed to the EditUserViewModel and set to the List property UserClaims. But Count=0 isn't any legitimate value, and I'm not sure where GetClaimsAsync(user) is getting that Count=0 from. As I said, the database table seems to be storing the data correctly.
If you need any more code or further details, be sure to let me know so I can make things easier to understand.