@EA_Lanna This is a widespread issue - lots of threads with the same exact problem. I have a thread that runs down all the solutions I've tried. Why you're not seeing anything on your end is because I don't believe this is a network issue but a code issue. The network is perfectly capable of handling the traffic - it's your code that's bottlenecking performance but only on a segment of players.
Why I think so - the game performance is worse under times of heavy congestion. The game became unplayable for me as numbers swelled for the new update - but then the weirdest thing happened - the glitch came out that prevented hundreds of thousands of players from being able to connect to the match for the new quest. While everyone was jammed up trying to get into the quest, I hopped in a normal round - and the game played flawlessly. Before May 5, the game performed perfectly for me. Occasionally during off-hours, the game still performs great for me.
During your issues with hit reg - it wasn't network related, it was software related. This is no different. Something was tweaked in the update roll out that is bogging your servers down.