Rate Limits exceeded and SSE connection to keep all frontends/backend data aligned

Hello everyone,

First of all , i'm sorry for my bad English but i'll try to explain better my problem.

I develope a custom full-stack with node and react App from github welcome code.

There are inside a lot of automation block function and one view that represents items and subitems of two tables connected.

I have only a problem, because to keep data fresh on backend and in any frontend connected I have implemented a sort of SSE connection frontend/backend with send request with keepalive and ping to maintain opened the connection. Unfortunately after a few time the exceed rate limit with 429 http error without any other infromation on header. Do you know if keepalive connection is counted like a Hit ? because can see "rate limit exceeded" also when the hit in one hour is like 100 or less than 50.

This type of connection is necessary when my backend recieve a webhook event and update any cache stored and frontend interface data.

I hope that is clear enough.