c# - ASP.NET Core authentication cookie only received once -

i developing application asp.net core , using custom cookie authentication. cookieauthenticationoptions are:

app.usecookieauthentication(new cookieauthenticationoptions() {     authenticationscheme = cookieauthenticationdefaults.authenticationscheme,     loginpath = new pathstring("/login"),     accessdeniedpath = new pathstring("/unauthorized/"),     automaticauthenticate = true,     automaticchallenge = true }); 

the cookie created fine , can see in browser settings throughout whole time running application. homecontroller class:

public homecontroller(ihostingenvironment env,     iantiforgery antiforgery,     ioptions<appsettings> appsettings,     terminaldbcontext terminalcontext,     iloggerfactory loggerfactory,     ihttpcontextaccessor _httpcontextaccessor) {     _env = env;     _antiforgery = antiforgery;     _appsettings = appsettings;     _terminalcontext = terminalcontext;     _logger = loggerfactory.createlogger<homecontroller>();     _httpcontext = _httpcontextaccessor.httpcontext;       _logger.loginformation("cookie coming");     var cookies = _httpcontext.request.cookies[".aspnetcore.cookies"];     if (cookies != null)     {         _logger.loginformation(cookies.length.tostring());         _logger.loginformation(cookies.tostring());     }     else     {     _logger.loginformation("the cookie null");     } } 

and how sign in user:

var claims = new list<claim>     {         new claim(claimtypes.name, logininfo.username),         new claim("dbname", logininfo.terminal.sesamdbname),     };  var useridentity = new claimsidentity(claims, "password");  claimsprincipal principal = new claimsprincipal(useridentity); await _httpcontext.authentication.signinasync(cookieauthenticationdefaults.authenticationscheme, principal); 

i running application , more 1 instances of homecontroller created, since have httpget methods return jsonresult needed view.

the first time application tries [authorize] (for index() method), finds cookie , authenticates , authorizes fine. second time tries [authorize] (for httpget method returns jsonresult) doesn't find cookie, though there in browser's settings. log get, illustrate this:

... info: server.controllers.homecontroller[0]       cookie coming info: server.controllers.homecontroller[0]       347 info: server.controllers.homecontroller[0]   cfdj8gslzenxanpnrtmz2dat9joqj6cehpcfbjdbnxbqyjjoqmd4naoi0l0krnmsqdvhqprp9tjjmmirayc5ilrqmcjqwnz0t9fjuk7qxg65wpp7sr43uzxwy6vgq7_qesp44gylle4ngealhxynzxmd-jywql4vjz5y4owpseklx-vvt03xalt54j_qqk_o4wjwlqizbpavtfkuwn4u7h8yd_rwmtigbpu21t5n35to9btqu5677xnxiefap3ukuxo4p-oxvakxqshy2xk_vydavv_xfv6jgncy4zicrb8vuhxgcnr205h4x0-o7jhb8mybc13azlmrawvg5dwtbd3_oco ... info: server.controllers.homecontroller[0]       cookie coming info: server.controllers.homecontroller[0]       cookie null 

why happen? can it?

the issue had nothing backend. using react in front-end , problem fetch() not passing cookies back-end getmethods. had set { credentials: 'same-origin' } fetch() in order send cookies request. help.