Lag after time, toggling graphics API fix

Hoping some tech savvy peeps can help here. (I run AMD, which I know has issues). In both retail and classic, on login and at random I start having choppy frames. This is fixed if I toggle from Dx11 legacy to dx11 and back.

Right after this switch, the system runs as I know it is supposed to (butter).
Obv I have checked the standard stuff. Drivers are good. This is the only game(s) that seems to have this problem.

Radeon RX 7900 XTX GPU
Ryzen 7 7800X3D 8-core processor.
G.SKILL Trident Z5 Neo RGB Series (AMD Expo) DDR5 RAM 32GB
GIGABYTE X670 AORUS Elite AX Mobo

Temps are never an issue. I play games much more intensive. I haven’t noticed any difference based on addon use. Any thoughts would be appreciated.

I am not sure if we are having similar issues but my full 30 man raid yst had me going to 8 fps at eranog. Same system as season 1 and season 1 never had this problem. Rez’s stormsurge reduce me to 4.

I am not sure if something’s wrong or it’s an issue with my system (using i7-10700K)

I can’t imagine it’s related but as I scanned for my issue I did see a lot of people mentioning what you said here. It seems certain bosses are just fps drains for many a setup.

There is significant issues with lag and fps in dungeons. I thought it was just overtuned, but the lag is significant. It isn’t your PC as I run,

Ryzen 9 5900x
64g Ram
7900 xt
And I run the game on a 2 TB M.2.