No it's a bug in Exile 2. You'll be at level 15. And it says you can raise more xp to get to the next level. And you hit that xp amount (which is also the max xp cap) and nothing happens, no level increase, no nothing.
I know what you're talking about... it gives a value of 65535 experience points, which is more than 30 times what it took to get to the level prior.
I guess they assumed that no one would be crazy enough to actually
try to go that high. 65535 is the highest possible value of an unsigned 16 bit integer. They were probably like "hey, let's see how many people waste all day trying to get this high..."
Could have avoided it just by setting that value to 0 like in the first Exile...
It's a fast punch if you're life is depleted. I figure that was a feature, not a bug.
Dunno if this one is a bug or a feature, but it's certainly easily exploitable. Turbo both buttons and hold on them and you can wipe out anyone in mere seconds, even the final boss. I'm gonna err on the side of "bug" though.