Elegoo Neptune 4 Pro Layer Shifting to Oblivion

I have had my n4p for ~1yr now, and it has not had any layershifting problems, but 3 days ago I tried my first overbight print, and it layershifted all over the place. Does anyone know why this is happening? So far I have tried: 1. Slowing it down to 60mm/s with acceleration of 3000mm/s² 2. Reprinting it (3 times) 3. Taking off the belts, and checking for damages (this reduced sound a lot, which leads me to believe something was rubbing, but the problem persists) 4. Retightening all the belts to 130hz 5. Checking all the eccentric wheels for wobble and adjusting for it where found (Z axis) 6. Relubricating all axis 7. Tightening the Z nuts 8. Checked that nothing is touching thr belts And today I am: 1. Reflashing the firmware 2. Switching back to Cura from Prusaslicer