Config: https://pastebin.com/y85tVhHC

Recently updated from 2.1.1 to 3.0 and players have been reporting some issues with recipes they formerly knew. After a bit of testing, it was apparent that 1) custom items that use phantom membranes weren't being accepted at all by cauldrons and 2) recipes whose items could be accepted by cauldrons were just producing standard "Cauldron Brew" bottles which appear to be some sort of default or fallback.

I noticed support for plugin:id formats recently so I'll add that I'm using custom items made with Denizen (https://github.com/DenizenScript/Denizen).

After more testing, it seems Brewery isn't the issue here. The testing server I use works just fine with Brewery when using all the same plugins and versions so it must be something else.