u/Ashamed-Pangolin7868

I need some help diagnosing a problem with my spinning setup because today I lost 3 minnows during casting.

My setup:
Rod: Sunset Atom 2.40 m 10–40 g (hard action)
Reel: Daiwa Crossfire 3000C
Braid: Sufix 4x PE 1.0 / 0.165 mm
Leader: 0.30 mm fluorocarbon
Lures: mostly 23–25 g minnows and metal jigs
The problem:
During hard casts I sometimes hear a “snap” sound and the lure flies away. When I recover the line, usually I only find the braid and the knot is completely gone. The braid near the end sometimes also looks slightly fuzzy/thinner.

I use mainly:
Yucatán knot
Albright knot

Important detail:

The leader knot does NOT go through the rod guides during casting. And I usually test the knot by pulling it and seems to hold. I have also practice at home with just the line and sometimes the braid gives up before the knot

I don’t think the fluorocarbon itself is breaking in the middle because usually the whole leader is gone. Could the knot be slipping/failing under casting shock? Or could braid digging into the spool cause this?