Current behavior: party member, while confused, has it's inventory inaccessible - with the exception of moving items from another character to the confused one using drag&drop on the character picture.
Expected behavior: while character is confused, inventory should be not accessible whatsoever (also not accepting new items).
This is a minor bug, BG2 engine (so BGEE will also have it). It does not have too severe impact on the gameplay (but allows to stop party member from running around if we encumber him/her). I did not try this one with stunned characters etc (there are more spells that render party member unaccessible for a time), just with confusion. So the issue might be more extensive.