FPS Drops in LK Transitions And Afterwards

Hey guys, my fps is a constant 144 except during LK where he drops the platform during transition phases, then after that my fps goes to 30-35 and won't go back up until I leave the throne room. Has anyone else had this issue and know of a fix? It is not my driver as I have updated to latest, then downgraded around 5 driver "patches" and still did not fix, so I just put it back to the latest driver.

I also know it's not my graphics card as I switched to my friend's RX 480 but still had the same issue (also tried the same driver "fix")

System:
CPU: i7-6700k
GPU: GTX 960
RAM: 16GB 3200mhz
SSD: Samsung 850 EVO 120gb

I think that's pretty much the only relevant information that's needed for checking FPS problems but I can provide more information if needed.