Laravel 8 passport token behind load balancer 2 droplet not work

Hi iam new for load balancer, i am trying to setup first one is just one droplet behind the load balancer, it work good, i using laravel 8 passport token for this…but after i clone the droplet and make it 2 droplet between load balancer, it start not working like “upstream timeout”

i already enabled the sticky session on load balancer, but the odd one if i remove the droplet so just left one, it start good again no “upsteream timeout” error on nginx error.log…

so i am thinking this is because might be the server not response…i use laravel as the api services with token bearer …so i am thinking this is because of 2 droplets behind load balancer that might be when login go to one server and when request to another server? so the token problem? but i already enable the sticky session? hmm have any idea? thank you so much before this has been a week to find the solution, and is it possible becaus CORS also? hmm i dont see something like that error…thank you again!