At the beginning of this month, I have upgraded to the Gigabit contract, that's when the problems started to appear.
Whenever I try to play Call of Duty Warzone or FIFA, the connection becomes laggy, and sometimes it's literally unplayable. If I am trying to play on Saturday evening it's practically impossible, there are lag spikes every 3 minutes. Similar things happens even to streaming services like Netflix or Amazon Prime, during any episode, it stutters like every 5 minutes, which is very annoying considering the price per month of the contract. Whenrver I do speed tests, jitter started to appear as well, before I used to have to jitter in the speed tests.
I have tried the HUB both in modem and router mode, still the same result, I'm currently using it in modem mode with a Xiaomi AX3600 router, which gives a better connection and stability.
I have attached a link for my BQM for today, I have had 2 gaming sessions today, one between 12 and 2pm, and another one between 4 and 6pm.