I had the same issue yesterday as Stamina Templar on a dungeon, weirdly it happened just a couple of times, and the lag spikes were less cause I was just using bitting jabs, also perhaps cause I logged off and back in again.
I'll test with my magplar when maintenance is over and post results here.
OK I didnt had any issues anymore, I remember now that I disabled VSYNC, did you guys have it on? If yes, please disable it and test again, and please let me know.
Try disabling all your addons and go do what you usually do for a good/long time and see if it still happens. If you did not already.
This thread already exist:
https://forums.elderscrollsonline.com/en/discussion/491482/templar-lag-fps-drop/p1
This thread already exist:
https://forums.elderscrollsonline.com/en/discussion/491482/templar-lag-fps-drop/p1