P2S right aux fan

Can someone know how to proper control aux fans when both are present? I installed the left aux fan on my P2S, but for some reason right aux fan is always at 70% and the left fan is at 30% even though I have the settings at 30% on filament setting for PLA+. I can override on printer screen to make them work at 30% each but it will be more convenient if they work balanced since the beginning of the print.

Thank you.

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