And another bug that is severely ******* me off. You're doing daily or weekly missions, HVT missions or just running about the city and enemies appear out of nowhere. For example, just five minutes ago I was wasting time cleaning up some of the things on the map I haven't done yet, like finding all the drones, phone calls and agent traces etc. etc., when I happened upon a group of three enemies. They spotted me and started shooting, usually larger groups than that don't bother me so I ducked behind cover and started to return fire. Then, out of nowhere and just like the shopkeeper in Mr Benn, about five or six enemies just appeared right on top of me, and I literally mean on top of me - they annihilated me before I knew what had happened.
This isn't the first time this has happened either. It's quite a common occurrence.