Been farming +11-15 keys to farm Wyrm crests (might I add bad system), and when beating the timer to +3 a Neltharus, the keystone is sometimes only upgraded by +2 and because of this it raises the question of whether or not the timer was meant to be shorter or longer. I am afraid of this potentially being an issue with even +1’ing a Neltharus on a higher keystone level.
Just had this happen on an 11 that we 3 chested by 44s. The resulting key was only upgraded by 2.