Hey guys,
I've been having some problem with my Navi World.
It functions totally fine, but the button that starts the timer is kinda slow to come back to normal after pushing in.

It's this top button, when i push in, the chrono works fine, and the button eventually come out normally, but it seems like it gets stuck and takes 2~3 seconds to come back to normal position.
Again, functionally nothing is wrong, just a "sticky" button.
Watch is about 3 yrs old, I had a maintenance service at Breitling USA headquarter in Connecticut about 1~1.5 yr ago.
I am traveling out very soon and won't have time to send my watch to Breitling USA for this service.
1. What do you think is wrong with this button malfunctioning?
2. Should I go to local SA (Tourneau) to repair? How much do you think it'll cost?
3. Should I wait until later (~2months) until I come back and send to Breitling Service? How much do you think it'll cost?
thanks!