Import of Raw defect after Update to 3.4.1

After Update to 3.4.1 the import function has an Error:

When i do an import of Only RAW (.cr2) in the requester are shown some jpg´s after the first import.

The sttings are the same.. normally him shows no more files because they are already in the lib. But there are othere files (.jpg) shown but selected are only raw´s.