I think this is not an RWR problem. Flew an A/G Mission on Multiplayer server. In a F16 HTS/HAD or Su-25T Fantasmagoria, you can clearly see SAM radar signature turn on/off intermittently. So the problem is the SAM and not the RWR. This was happening with whole host of radar SAM's SA-5/8/10/11, Patriot, HAWK, Roland, Rapiers. There were no patterns on how long a SAM radar signature will stay on/off. Also what was confusing was there was 1 F-16 in our group that would receive SAM radar signature perfectly. Sorry, track file too big to send. Will try to replicate it and post in shorter mission.