I've leveled up damage, accuracy, crit, attack speed and pen talents. All of them follow a pattern; the same value increase per level, so I assume this is a mistake? In this case, I haven't really upgraded the talent in question to level 2, these are the previews. Maybe it's just a visual bug, a mistake or it's arbitrary. I'd love an answer from the devs
Edit: I tried leveling another Rank 2 talent and it's the same thing. I guess that is the pattern 😅 I thought it'd be like the Rank 1 ones, same increase every level, but with Rank 2 only the first level has a higher value, which is odd, but I guess it's how it is.