Advice - DCS UDP connection stopping after some period of time

Not sure this is the right place for this but...

Summary: My (c#) app is working fine, tracking, via UDP, all units. However, at approx. 36 minutes into it everything stops...DCS seems to stop sending. It's consistent (+\- 9o0 seconds); no exceptions thrown. UDP connection is running in a separate thread; UI remains responsive...

I'm writing a .Net (c# for this particular app) that will, someday, possibly be used to explore the DCS world for various purposes; help other dev's (via plugins), etc. Right now I'm simply extracting groups|units and updating their positions - tracking everything on a map, with custom map data (airspace, terrain, etc).

I've done quite a bit of .Net UI programming before but admittedly not a lot of UDP stuff. Has me scratching my head. Have written the UDP connection 3 different ways; examined my lua export overrides/hooks. All looks good.

If anyone has any ideas I'd appreciate it.

Thanks ahead of time,

J