Same problem - the article says you either have to update the automatic connection (Consorsbank connection hasn't worked for me for months...) or add it manually. But I wouldn't know how to get rid of the -11% either...
@TheRealBrockNicholson Yes, it worked for me too. Copy the new ISIN, go to edit at Unilever and then replace the ISIN with the new one for all your purchases. After that the -11% was gone for me and now it shows me everything correctly.
