game freezes

When someone gets hit with the knockout powerup, all players in the server (or at least the recipient/dealer, it's hard to tell) will briefly hitch. This is normally not too big a deal, but its used in a minigame of mine where that brief hitch is often grounds for instantaneous death because...

long story short , i am redoing almost all my map (pl_cliffedge) and that means i have to move stuff or delete many buildins/areas which explains the problem i have maybe. well i can compile the map , launch tf2 , join the map and when it finishes loading and you can press continue everything...