Too much water usually gets the mold into survival mode, which will make them excrete acid and sour the wine. But let's see! Maybe al dente it is next time. Or some additional stale bread to soak of the initial load of liquid? So many possibilities!
To be fair, this process also works with unmalted and cooked barley. Differently flavoured, but it works (Tibetan or Himalaya chang is basically just that). So I wouldn't be surprised if this also works with pasta.
Are you 100% sure that you are not tasting the slow progress of oxidation? Looks a bit like it because the neipa would be the easiest to oxidize in a tastable way and it is also the one that shows the signs of the off flavour first.