Seems that wolf form illusion is also affected by the display bug, shrinking me to the size of a chihuahua.
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A druid /friend has also informed me of a time that he transformed his group into a pack of wolves, and upon the druid returning from linkdeath, the wolf-ogre in his group became a HUGE wolf. The Dry Bones skeleton illusion is also affected by the bug. The only illusion I have not been able to test so far is the werewolf (at level 44), which I feel will respond like the elemental illusions and not be affected by the bug.
TL;DR Wolf form is also bugged, dry bones is also bugged. Could someone with the ability please look into the way the game saves the illusions' model/skin/height information to display? Or maybe write it down for later?