It appears that SB_PCB_Octopus_wiring.png has mismatched e-stepper wiring.

[andrey-seryukov]

SB_PCB_Octopus_wiring.png shows Red-Green-Blue-Black order on e-stepper connector. However, according to 2pc1.png it should be Blue-Red-Green-Black, matching the MCU connector order.