KB Protection Weirdness

[Rudra]

So I have a Crab Spider in which I slotted 1 Blessing of the Zephyr: Knockback Protection, 1 Karma: Knockback Protection, and 1 Steadfast Protection: Knockback Protection. By all rights I should have Mag 12 KB protection. Yet, when I check my combat attributes, it fluctuates. Sometimes it says I have Mag 12 protection, other times it says I have Mag 16 protection.

 

Edit: Update: It took a while, but it finally settled on 12. So far.

 

Edited August 22 by Rudra

[Luminara]

The Karma IO is set to stack, rather than replace, and has a 10.125s duration/10s activation.

[Rudra]

Thanks.