So, to the people who are stuck where I am in chapter 5, I'm trying to see if I can find some commonalities here that could explain what's not letting us progress. Here's where I'm at:
-Faith level 9, 3940/6700
-22k gold
-Every available map except for loser's maze 1f and ruined forest city cleared (pretty sure I did that one on another save where I was messing around trying to get it to work, but not 100% on that)
-Every available key item except for the refined silver medicine crafted
-Avaro lvl 22
-Fia lvl 23
-Mikeyu lvl 18
-Ior lvl 23
-Kisnir lvl 21
-Diethelm lvl 21
-Lishenzeri lvl 20
-Katorit lvl 5
-Karinyuiki lvl 15
-Ranrinyuiki lvl 19
-Rurinyuiki lvl 17
-Yourinyuiki lvl 20
If all of you who are stuck here could post this information, maybe we could find similarities (like, say, Mikeyu or Katorit being underleveled) and try fixing our situation by addressing them. And, I mean, if one of us can figure out how to do it we all can as long as we have information on the circumstances under which it was and wasn't working. Also, if you're seeing this and get the event for the crafting recipe just fine, it'd help if you could post this information too so we can discern differences. I have absolutely no leads on what could be causing this so I'm willing to go detective mode on this.