I don’t recall seeing this before (which may just mean I rolled a 1 on my Perception check.)
The affix range says Tier 6 but it’s roll is the same as the regular tier 1 version?
If it’s a bug, I’ll move it to the bug report. It’s listed in this bug post but there doesn’t seem to be any comment on it, so wanted to check to be sure. Tier 6 Idol Affix
Hm something is cooking and leaked? 
Might be, but it’s more likely that someone screwed up the Tier description with some background hotfix and now enchanted Affixes can display as ‘Tier 6’ rather then ‘Tier 1’. Similar to how enchanted Affixes are handled.
Might be that EHG put the weaver Affixes under the ‘drop only’ table for rarity of Idols and since that’s Tier 6 by default the renaming simply broke.
Would be my guess at least.
So we think it is a bug most likely I guess? 
I’ll move it to the bug section, so it isn’t missed.