Ngginx reverse proxy issue

Hi

we are using nginx as proxy the request to back-end t web application ,
but
some times when users accessing webapp via proxy , they faced some
unusual
behaviors like buttons are not clicking , Dropdown lists are not listing
data .

this is my nginx reverse proxy configuration , is there any
modification
that i need to do to avoid such a issues , please advice

location /webapp {
  proxy_set_header X-Forwarded-Host $host;
  proxy_set_header X-Forwarded-Server $host;
  proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
  proxy_pass http://192.168.1.16:8090/webapp;
  proxy_redirect off;
}

Thank You
John

Hi…

Any expert have any idea what may causing this issue

Thank You
John