If you’ve now got the Mini E3 V3, make sure you also have the very latest klipper version and also flash the SKR MCU with the latest klipper version. The chip it uses would randomly give a ‘reschudled timer in the past’ error which is a pain in the ass as nothing would stop it. Looks like it was a chip ADC issue as per Stm32g0 users should update to latest Klipper