I'm not entirely sure if this IS a bug:
I thought that your character's actual size reflects upon your polymorphed size, right? However, when my tiny druid wildshapes into a bear….It's a regular-sized bear!
Strangely, when I undo the wildshape, my character briefly shifts for a few seconds into the tinier version I thought my bear shape would be.
Anyone else ever have this happen? If so, any clue how to fix it? Does a DM need to get involved?