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. https://e2e.ti.com/support/logic-group/logic/f/logic-forum/788628/faq-what-should-be-done-with-unused-i-o-pins-of-the-level-translator-devices
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?