Cubase LE 9.5 // Click track can be heard on other tracks


so I have a TASCAM US 4x4 and set to click track to Mono 4, which is the last output channel. It sounds fine on channel 4, but for some reason you can also hear the click on channel 2, but not on 1 and 3. :question:
Really confused …

Thank you in advance for your help!

Hi and welcome,

Could you attach some setup screenshot(s), please?