Hello, there. Welcome to tf2maps.net. I am a fellow Deathrun mapper. I made dr_castle_steveh, am working on dr_steamworks_extreme and helped out a little with dr_bank.
When a round changes in TF2, nearly every entity resets. There are some exceptions but nothing that would normally interfere with your trap logic. If you have entities that aren't resetting, then either the round has not changed or your trap logic is broken. If you send me your VMF or a recently-compiled BSP I will take a look.