Couple things to check.
Payload size, are they different between a logged in user and guest?
Which page is this happening on? All pages or just a specific page?
Do you have any custom plugins?
@Sandeep-Bhuiya I use a clean environment, redeploy, it's still the same problem.There is no ddos case, should be the code problem, login user access, CPU 100%, no problem with visitors