Affects Version/s: 0.16.1, 22.214.171.124
Fix Version/s: 126.96.36.199
Platform:Windows 10 - PC
The wither Boss seems to have the wrong height value, Why i think that:
Nametags (using Addons to always spawn them with name) are on the ground
Riding the wither makes you appear at his 'feet'
When i change the scale, the particles of the effect are not 'resizing', so you have a small 0.2 scale wither but a 1 scale particle surrounding.
Making the Wither invisible does not make the charge animation invisible.
Also he is only rendered when the feet is visible.
I added some screenshots where you see the Nametag issue and the particles.