problem about reset of FFT IP

your nios clk is 62MHz, fft clk is 80 or 130 ?

in either case, your nios clk canot be synchronisd edge on edge to fft clk. Your post suggests as if you are having recovery/removal timing violation. But such violation is unlikely to cause persistent problem like yours.

As far as reset is concerned, the proper way is to register the reset through two registers clked by fft clk to filter off any possible metastable states and that is enough.

If the problem persists then it is not the reset between two clk domains to blame.