https://www.reddit.com/r/pathofexile/comments/7nmoz2/guide_crafting_weapon_specific_murderous_eye/
So I was rolling throwaway chaos harvests on some abyss jewels and noticed that the murderous eye jewel was rolling only dagger mods until I hit a roll with no weapon specific mods.
When I rolled again, I hit mace/scepter mods and the jewel got stuck rolling those for about 5 crafts.
If you don't believe me, you can test it yourself with alts, chaos, anything really. There will always be a roll with 0 weapon specific mods before you change to a different one.
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