I have ran into a bug ( or feature, IDK TBH) where the server will either start with really difficult bots or it will switch to difficult bots mid game.
It seems like if your team is doing really good vs the AI some sort of nightmare mode takes over and you have to fight enemies that are on a whole new level.
I noticed this about a month ago and I though it was just me going crazy, however I saw this happen twice this last weekend as well so i know its not just me.
The last time i saw it, the AI called in an artillery strike that took out the whole team even though we were all indoors ( seems like an artillery aimbot since we were all hit directly while in cover) and when we respawned for the next round, they were acting differently, shooting much more accurately and rushing the attackers.
These bots also don't move in groups of 2-4 like the regular bots do, they usually move alone and try to sneak up on you. It also seems like there are less of them.
In order to defeat them you are forced to be way more careful than usual and its not uncommon for the whole team to be wiped out within a few seconds.
Also, it seems this "mode" prevents you form using artillery strikes as well, since my team called one and it never landed.
BTW this was through matchmaking, so official servers.
Am I the only one that has seen this happen?
I'm not complaining... it actually 100 times more fun to actually have to be careful while playing.