FSRS parameters causing huge review spike?

I recently used FSRS Helper’s “Reschedule all the cards” after optimizing my FSRS parameters just to check usually i dont reschedule.

My review cards jumped from ~200 to ~900.

That seems like a huge difference. I’ve attached my monthly retention and parameters below.

Are these parameters working correctly, or did I configure something incorrectly?

i didn’t changed rhe desired retention at all

If you parameters changed, then the reschedule was based on those new parameters. Any cards that were pulled to new due dates in the past are overdue and would be included in your due count for today. But you’ll have to check Stats > Future Due to see what the effect is on your regular daily workload.