Getting the 404 error occasionally for the wordpress post page.

I am getting the strange bug on post page, When I click post link from the posts page, am getting the 404 error occasionally. Some times it will load exact post and some times it will return 404 error

The most other scenarios are:-

Mobile devices :- 65% of the time am getting the 404 error for few posts and when I copy paste the original link on the browser directly, it will load without any issue.

Desktop:- 30-55 % of time getting the 404 error for few posts and when I copy paste the original link on the browser directly, it will load without any issue. Also whenever I am getting this issue, will work fine after a refresh/reload.( Checked the link in all scenarios and all links are well and fine)

Note: I am using the custom permalink structure (using post name in url instead of post id)

Please help me to resolve this issue