GET request success 200 NO response and the page keep loading

GET request success 200 but no response and the page keep loading, I see the response after 10 min in the Response tab of devtools.
and If I open the same GET request in another tab I can see the response with 200 in few seconds.
what could be the problem?
ALSO, it’s not a CORS problem because after around 10 min I can see the response
request header:
HTTP/1.1 200 OK
Access-Control-Allow-Origin: *
Content-Encoding: gzip
Content-Type: application/json
Date: Sun, 09 Jan 2022 10:33:03 GMT
Server: nginx/1.20.2
X-Content-Type-Options: nosniff
X-Frame-Options: deny
X-Xss-Protection: 1; mode=block
Transfer-Encoding: chunked

request response:
GET /api/datasources/proxy/19/test1/test?from=1610186449&to=1641722449 HTTP/1.1
Host: x.x.x.x:3001
Connection: keep-alive
Pragma: no-cache
Cache-Control: no-cache
Upgrade-Insecure-Requests: 1
User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/96.0.4664.110 Safari/537.36
Accept: text/html,application/xhtml+xml,application/xml;q=0.9,image/avif,image/webp,image/apng,/;q=0.8,application/signed-exchange;v=b3;q=0.9
Accept-Encoding: gzip, deflate
Accept-Language: en-US,en;q=0.9
Cookie: grafana_session=d462e3e81cc3cabbead59xxxxx

welcome to the :grafana: forum, @ahmedaboalhija9

can you add some detail here? what version of grafana are you running? anything in the network tab of your browser’s dev tools?