Ah, sorry to hear that! This isn't something we've previously heard of, so it might be difficult to reproduce and solve.
Could you let me know if this is the same with all enemies after you first encountered it, or just Barkplug?
And is it just Nugget (if you're not sure, you could try a healing item of buffing ability to get to Sausage — it would also be useful to know if this works as well).
Also, does the marker appear on Barkplug like it does with the previous enemies, or do you not see that either?
We finished work on this quite some time ago, but we can try to reproduce on our end.
Thank you for the quick reply! This only happened with Barkplug, and I wasn't able to proceed through the battle in order to see if it affected other enemies. It used to only affect Nugget but the last time I tried, it also affected Sausage. The healing items/mewgic still work; I just can't use any offensive attacks/items. 
