I have a weird one for you.
That new repeat I have been having issues with, odd accels, beat up grub screws, poor prints, every time the second layer was shifted even though I rebooted, new gcode…I removed the microSD and it is perfect now. Reinitialized the eeprom and the accels are perfect.
I had issues on my MPCNC as well. For some reason I pulled the card to flash it and it fixed it there as well. I do not remember what that issue was but it was a few months back.
I am wondering if the micro SD is the cause of your problems as well. I see it is in, in all the pictures.