Panerai PAM728 Hard to Pull Crown Completely

[bakaneul]

Hello all!

I just have a quick question about pulling out the crown of my PAM728.

Sometimes(not always), when I try to pull the crown out to set time, crown makes a pop noise and stop in the mid way so I have to let it go and try pulling it out again to get it fully pulled out. But it happens maybe once in 4-5 times. I feel like I am damaging the crown mechanism whenever I hear that popping noise before the crown is fully pulled out.

Any suggestions how to avoid this?

Thank you in advance!