End stops act funny

I hope it keeps working. The funny thing about electronics is that the characteristics of the electrical components (resistors and capacitors) can change over time with temperature and vibration. The SKR board has a known defect where they designed that circuit to be on the knifes edge of acceptable. Be prepared to encounter problems possibly in the future. There is a real fix, but it involves soldering 6 resistors to the bottom of the board. There’s more info in this thread: Firmware issues? - #5 by robertbu