Ah in which case it is very unlikely that this is a form change issue, and the issue is actually with rappelling while a target is stunned by Elise.
Might be an issue with the specific coding on Rappel removing Elise from the map for a period of time.
@CHIMPUS:
Can you do this test with Zilean Ult or GA (or both)?
- Get Elise to low HP
- Put Zilean Ult on Elise / Have GA purchased and passive available
- Stun target with cocoon
- Immediately have someone kill you
Can you also do this test with Zhonya's Hourglass?
- Stun target with cocoon
- Immediately use Zhonya's Hourglass
These tests should create a different effects that are similar to Rappel where Elise is "removed" from the map for a period of time. This would allow us to pinpoint if the issue is with Rappel coding, cocoon coding, or working as intended cause Elise is removed from map (highly doubt the last one being true, but you never know).