Window in air app shrinks when moving it between 2 monitors

We have an air app with a window size of 1200 wide.

If you have two monitors, and move the Air app window from one monitor to the other(right to left), the width of the window gets narrower. If you move it back and forth several times, it continues to get smaller and smaller in width, cutting off the right portion of the content in the window - it never grows, only gets smaller. The shrinkage only happens once the app window crosses into the left montior.

This happens on any Air app as far as I can tell.

I have seen this now on two different dual-monitor systems.

I would like to know how to prevent or correct this odd behaviour.

Thanks for any suggestions.

Bob T.

Senior SoftwareEngineer