My hard 1cc replay works 100% okay.
My friend's lunatic 1cc replay, however, desyncs on the final phase of the final spell, both on original and English patch.
I'll be doing a lunatic 1cc later on this week and will report back to you the results. So far, all I've done are stage practice and spell practice on lunatic. All of the ones I've saved (and also uploaded to YouTube) work fine.