Yep, same here Bribie - normally when I put in my kettle finings (I use course ground k-carageenan) what happens is that over a period of time, mostly in the whirlpool... The flocs of hot break aggregate together into larger snowflake like chunks. the brew bright makes it look like someone has coarsely crumbled stale bread into the brew pot. Rounder chunkier particles that rapidly sank.
How much you using? I used 6g in a 25L post boil volume. Hydrated the stuff into a slurry with cold water before stirring it in.
TB
two rounded teaspoons.
I've repackaged mine into these in the freezer and it's free running and not getting sticky at all.