Downfall Bug-Specific Map-Bell Objective-Enemies Non-active.
In the downfall game mode there's a specific map with the objective of ringing the bell and fighting off waves of enemies. Once you ring the bell the enemies don't appear for a while and when they do they seem to have a hard time targeting the player. Leading to them standing in the area where spawned being idle. I'm sorry I couldn't provide better screenshots of the map I was talking about but I hope you're able to identify it. Also additional information that may not be vital to the bug: This was a game of downfall for single player with the Mines map selected.