I am also having this issue.
Speed tests for my wired home network show north of 600mbs download with 10-20ms of latency. Other online games do not lag at all.
I noticed when the issue occurs, if I then point my POV to an area of the map where there isn't much going on, (behind your spawn on a breakthrough gamemode) the icons in the top left of the screen for latency variation and packet loss go away.
I have been a battlefield player for years and the game becomes almost unplayable. If this continues I will have to consider a refund as I want to play official servers not just the custom ones.
