Archeronian sickle...bug?

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Platform: PC | Xbox | PS4
Game mode: Official Testlive | Private Testlive | Singleplayer
Problem: Crash | Bug | Performance | Misc
Crash dump link: (if applicable - fill out the crash report and enter your email to get the link)

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archeronian sickle does 40 damage a swing 2 swings every 1.5seconds modified by str, no combat animation lock, can easily step around ANY npc and Wreck them

was destroying dragons with this, could only think what you could do to players, hope its brought down before launch as its SUPER OP

Repro steps: