Seems to happen with all the finer powders. I use Lovex D032 (formerly Accurate #2) and it is a very fine ball powder - pours like water. It sticks to anything plastic including the Lee powder funnels and both my Lee perfect powder dispenser hopper and my Hornady powder dispenser hopper and even my RCBS balance pan which is aluminium. The charges are very small so I don't see an ignition risk.
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