'AWS Application Load Balancer error 404 on socket io

Is there anyone who encountered AWS ALB alternating errors 404 and 200?

1st refresh (404)

Cannot GET /socket.io/

2nd refresh (200)

0{"sid":"0tMHzHEjhSK3wRK2AAOE","upgrades":["websocket"],"pingInterval":25000,"pingTimeout":20000,"maxPayload":1000000}

3rd refresh will be 404, then 4th will be 200, so on and so forth

load

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