Okay, I'll bring it up. For now, please keep to the limit of 2/2 as that is the intended function. Trying higher than the intended amount will cause that error.
The fact that there's a Limit to begin with is annoying... That's only 32 Transmutes per Resource, not a good start to these Global Events imo, I agree they should not be anything insane like a full 5 Star Crystal or Awakening Gems but making the already Lack Luster Healing Resource Transmutation Reward have a very restrictive Limit just makes it really meh.
Comments
Doing 3/2 gives you this, but 2/2 works fine.