Does anyone know what could be causing the fine spray towards the middle > end of an extraction, and the partial worm hole in the puck shown below? Ive never had it before. It doesnt happen all the time. Pours are pretty good otherwise. Thanks. 
Beginning

Middle

Towards end

Note: this puck belongs to a different pour (taken a couple of shots before), but result is always the same. Hole ends up on the perimeter but at different locations - 1 oclock, 5 oclock, etc.).


Beginning

Middle

Towards end

Note: this puck belongs to a different pour (taken a couple of shots before), but result is always the same. Hole ends up on the perimeter but at different locations - 1 oclock, 5 oclock, etc.).

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