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SN74AXC4T245-Q1: floating input

Part Number: SN74AXC4T245-Q1

Hi team,

according to datasheet, input pin should not be left open. however, here is an FAQ, is shows that AXC device can leave unused input floating. 

Could you help to confirm which one is correct?

my customer fixed the PCB and left two unused channel input pin floating, is there any risk?