I did a search for this, but didn't see any bug report on it. I have macros setup with /timer 6000 (10 minutes). It works fine when I click it, but when I zone the timer resets on the button. It would be nice to have this retain through zoning for longer timers. I noticed also if you right click it the timer will reset (I think this is fine incase you do want to reset it for some reason).