Disappearing GUI items?

I’ve built an applescript that displays start time, stop time, total time and a progress indicator, and while it everything works correctly every now and then when I stop or start the tracking some of the GUI disappears. It didn’t do this until I added the progress indicator.
Basically you hit a radio button to start and stop tracking, and all the functionality happens in the on click handler. Is there some way to fix this?


Was is “some of the GUI”?

the radio button fields, the time, the line seperator.
Update: I had placed the spinning progress indicator to the right of the radio buttons and text,
I’ve since moved it to the left of these items I haven’t had the redraw problems.