FFT megacore IP (source_sop is asserted for 2 cycles, sink_ready random deasserts)

I think I know why sink_ready goes low, but still do not know how to fix the problem - When changing the FFT size, the data that was still in the pipeline must exit before the new data can be entered. The FFT core deasserts sink_ready while it is completing the existing workload. However, since posting the message, I have written in a waiting system such that whenever sink_ready goes low after a size change, the entire operation pauses. I am still getting errors with source EOP and errors being reported. My sink error stays 0, so it may be FFT internals going wrong somehow. I think my sink SOP is pulsing before I get time to pause the pipe, so I will attempt to fix that now