I think this bug came beacouse caed nua floor 3, a ogre shaman used their "swarm" spell, and there is a point, without name but red, untargeteable in there.

 

After killing the enemies the battle ended but the debuft and visual effect dont.  After reloading the visual effect was gone but it seams the defuft is still in the character sheets.

 

 

 

It seems I've encountered the same problem - but look at your Eder defences - they should be half of what they are - I noticed that after save/load they sometimes grow up to those enormous values, and stay like that permanently no matter what you do

I believe I am having the same issue. Do your spell spawns also fail to disappear until they die? 

 

I managed to get around it by becoming unconscious intentionally. 

I'm having the same issue. Got the debuff when taking down the Ogre from the keep bounty

Same thing happened with me from the ogre druids in Elmshore. Permanent swarm debuff until I saved and reloaded.

I had this same bug where debuffs would last indefinitely, even after resting. The only way I could remove it was to take them out of my party and put them back in again. 

Yes I had the summons dont going away, but it solved itself after reloading the game.  

For the first bug, it seams that the problem is alwais on with druid ogres, their spells dont go away after the combat, and keep tiking even after insta rest, (saving and reloading solves it, but i have to do it each time i fight a druid ogre)