Stealthy: Each attack that targets this monster must roll 3 additional range beyond the normally required amount or the attack is a miss.
One interpretation of this is that melee attacks normally require 0 range but against stealthy need 3 range.
The other is that melee attacks never check range (according to Step 3 of the attack sequence) so are immune to Stealthy.
The rules are ambiguous as to which interpretation is correct.
Any official answer as to which way to play?