^^^^
Yeah, this is my experience with all finings. As I said I may have overdosed this one, and it may have something to do with particularly powdery yeast (34/70 as 2124.) Anyway, the result is consistent, as some people get faster results with other finings too. Today I'm going to dose a keg with isinglass and just give it time. I'll have 3 in a row to compare that way: gelatin, kieselsol/chitosan, and isinglass. They all get the job done with time, just interested if there's a definitive advantage to any one.
EDIT Racked to serving keg, indeed a lot of fluffy sediment in the lagering/fining keg, a little of which will have carried over. Not sure this stuff would ever settle nice and hard like isinglass. Anyone trying it may want to start with small doses.