Bug: Crafted Engineer Headgear ilevel Not Properly Ranked

Patch 7.2.5 - 110 Affliction Warlock - With several Semi-Automagic Cranial Cannon crafted engineering headgear pieces in my bag, the Best in Bags evaluation fails to rate the items at a potential 900 ilvl when I have Filters and Options for Obliterum level set to 10/10. It appears to only rate these items as 850 and does not take into account their upgrade capabilities. I am an engineer so being able to equip them is not the issue. This is not an issue with any other crafted gear, only crafted engineering headgear. I’ve since looted a Tier 20 piece for that slot, but should I want to move gear around and put a crafted piece in there, it would be nice to see the app rate these items properly.