I haven't played a lot with that delay but randomness is clearly intended.
From my understanding, it's the Seq Drift that has the most influence on randomness :
Seq Drift—Determines the likelihood of the entire sequence changing every time it loops around. When set to 0%, the same sequence loops forever. TIP: Assign this parameter to a footswitch set to toggle between a higher number and 0%. If you hear a random sequence you want to maintain, press the switch to set Seq Drift to 0%, and it’ll repeat that way indefinitely
If you want a small amount of randomness, you should set the Seq Drift to a small value.
But if you don't want any randomness at all, this is clearly not the adequate delay.