Network receive goes very high after sometime

Hello. I found out that servers that are running for about 5+ hours in my game makes them unplayable for users with not good connection. I’ve compared server stats with new and old ones.

Old:

New:

I don’t know why this happens because there are only two scripts that sends data to player continuously: the one that responds for neck movement and ping check. May this one be a problem?

By the way, my game has streaming enabled with legacy streaming behavior. Could this be a problem also?

Any help or advice would be appreciated.