Can't see others fighting

Hello.
I have some problems with other players. In open world Iusually see someone fighting mobs but can't see character or even nickname. Is this a bug or what? Kinda annoying.

That sounds like a bug or a glitch, I've never had this issue! Try contacting support if it continues! c: Hope this helps.

You encountered a bot that attacked the mob from below the ground.

If youre asking about seemingly invisible characters killing open world mobs, this is a known thing. These are RMT bots. They use a movement hack to get underneath the terrain, and kill from there. They routinely get banned, but the RMT people just make new ones and start again. You see them less the later you get into the game, until you reach a point that they never get to before being banned.

If youre talking about visible characters but you cant see their attacks or their names then this is more likely a settings issue. You can make some changes in your character configuration screen on what battle effects are shown and how other peoples names are displayed.

It seems they're really a bots. I saw some strange nicknames like "Ydoajsdoap Apsojdposa" and their always acting strange. Also some of them stood just below the bridges. I also saw lots of players with normal nicknames and they are visible for me just fine.

So the case is close. Sad there are so many bots.

You get them in every game unfortunately, you'll never entirely stamp out botting and RMT. I've run into RMT power leveling groups a couple of times in really out of the way places.