Getting signed out on live site after AppPool recycle

On my live site after the AppPool is recycled I get Signed Out, the sign in code is something like this:

var identity = new ClaimsIdentity(new[] { new Claim(ClaimTypes.Name, id.ToString(CultureInfo.InvariantCulture)) },
    CookieAuthenticationDefaults.AuthenticationScheme,
        ClaimTypes.Name, 
        ClaimTypes.Role);
            
var authProps = new AuthenticationProperties { IsPersistent = rememberMe };
if (rememberMe)
{                
    authProps.ExpiresUtc = DateTimeOffset.UtcNow.AddMonths(1);
}            

HttpContext.SignInAsync(
    CookieAuthenticationDefaults.AuthenticationScheme,
    new ClaimsPrincipal(identity),
    authProps);

I’m signed out but in the browser dev tools I can see the cookie:

Name: .AspNetCore.Cookies and it has expires 1 month later: 2023-06-03T11:29:35.696Z, Domain: www.mysite.com, SameSite: Lax, Priority: Medium

This only happens on the live site, on localhost I can recycle, restart iis, and I stay logged in.

.NET Version

7

Anything else?

Site published on Shared Hosting Server

[Tratcher]

Yes, somewhere your host will let you persist data.

[Tratcher]

Your encryption keys are being stored in memory and lost when you recycle, it can no longer decrypt the old cookie. (Check your logs). You need to store them outside of the app. https://learn.microsoft.com/en-us/aspnet/core/security/data-protection/configuration/overview