Ultivo lc/tq Nozzle voltage fault

Our Ultivo LC/TQ fails autotune immediately citing a Nozzle Fault. The log suggests the associated voltage is out of optimal range. Funnily enough, the system passes check-tune without any issue! The check-tune report shows the voltage perfectly matching the last successful autotune report. 

Can anyone hep me figure out what's causing the autotune to fail due to high voltage, but the check-tune to pass without issue? Thanks, team.

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