This bug affects the game since release but no repro steps were available... until now
When a Druid is spiritshifted, sometimes their regular form is visible alongside their animal form. Like this:
SAVED GAME: link
Load the attached saved game.
Select Hiravias and right-click on his Spiritshift ability; observe that it lasts for about 19 seconds.
Bring up the console to summon a hostile creature so that combat can start (e.g. BSC cre_blight_earth 1).
As soon as the hostile creature appears, pause the game and have the main character (the death godlike holding no weapons) engage it. This ensures that combat will last as long as you need to run the test.
Select Hiravias and make him Spiritshift. Start a chronometer immediately to monitor the duration of the ability.
Select Grieving Mother.
When the chronometer hits the 13-14 second mark, have Grieving Mother cast the 4th-level power Silent Scream on Hiravias to Stun him.
Observe that Hiravias's orlan form appears while his Autumn Stelgaer form is still visible.
Edited by AndreaColombo, 13 June 2015 - 10:10 AM.