What I expected to happen was...:
to get the Mushroom Stem
What actually happened was...:
I got the Mushroom Stem and a Knowledge book for every stem Broken
Steps to Reproduce:
1. Break mushroom Stem with silktouch effiency 5 and haste 2 if you do it fast enough you can get a knowledge Book
Did you happen to be using any data packs at the time of when this issue occurred and if so, what were they? If not, please provide some additional screenshots or videos demonstrating this behavior whilst the F3 debug screen is enabled. Thanks 🙂