So I am getting rid of mycelium and big mushrooms in mushroom fields and the stems aren't dropping mushrooms but green books. This bug applies to both the red and brown mushrooms I created and edited a video, where the bug is shown, but unfortunately the video has bigger size than it is allowed. You can watch the video here.
And as I tested this bug in snapchot 20w51a, it seems to be fixed. But just to be sure I submited this report.
Hey there!
This report is invalid as you game was modified when experiencing this issue. In the video, I can see that you're using some kind of modification and the bug tracker only handles issues that occur in vanilla Minecraft. If this issue persists without the use of mods though, feel free to make a new report.