has any one seen this before?

help, with my rpg, for some reason on my server , waves will randomly just stop at the end.
no monsters or any thing , and the game will just say untill i restart the server,
the worst part is , its random. it sometimes helps when i exchange random monsters out for other ones on my waves
my muts are

satoreMonsterPack Version1.20,
satoreMonsterConfig Version1.20,
UTV2004S,UT2004 RPG,
SuperMonsterPreloadv2,
Score Fix,
Multi Dodging 2k4v3,
MonsterPackINIv2-TexturePreloads,
MonsterPackINI-TexturePreloads,
Monster Mover,
Lucifer Preload,
Druid's RPG Upgrade Mutator,
Druid's Mutator Config,
Druid's Invasion Spree,
Druid's Invasion RPG HUD,
Combo Necromancy - v2

does any one know a mod that would fix this, or y this could possibly happing, its frustrating.
thanks

When using a bunch of mods things like this tends to happen.
I have seen it on my server in the past if it runs for extended periods of time.
satoreMonsterPack causes alot of warnings in the logs, but is difficult to do without.
When I ran my server I found that if I restarted it every now and then it would never crash or have this issue. I ran a query script that checked for player activity every 5 mins...if the server doesn't respond to a query, it changes the polling time to every 20 seconds...if the server fails 5 consecutive queries it will assume the server crashed and restart it automatically. It also checked the player count...if the server was empty for 30 mins, it would restart to refresh the system, or fix a connection issue.

What monsters are you using?