It is common for RC-7 and RC-8 to do two independent raises of the nozzle after power up. The first one probably is to get clearance to home for the X and Y portion of the G28. The second raise can happen if the nozzle doesn't have enough clearance to deploy the Z-Probe. The first rise should happen before any X or Y movement. The second rise should happen immediately before the probe is deployed.
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