I tried to look for a solution, but I haven't been able to find one. I can't distill any of the custom brews I make-- no matter what, it changes to 'murky distillate' after the first runthrough. This doesn't happen with the 'default' brews (like I was able to make old tom gin just fine). I did add new ingredients so the new recipes were usable...
I'm running paper (1.17.1, build 279), and I did add a few new plugins today (coins and essentialsX).

Oh, uh... I'm not the brightest today. This is a user error, I didn't have the recipes configured correctly. My bad!