Cannot modify the content of encrypted 7z files. (Cannot access the file, because it's used by another process.)

[Aztek92]

Modifing existing* 7z files is not possible since some updates ago.
(*not sure if they have to be encrypted, but that's what im working with)

Steps to reproduce:

1. Open existing and encrypted 7z file
2. Modify the content (try to delete or add new files)
3. After processing the changes, error popup comes up "Process cannot access the file, because it's used by another process" (translated from another language, may not be literal).

The only workaround I found is to unpack the file and pack it again with modified content.

Also I'm sure that the file is not used by any other software - I checked it.
Native 7zip software works just fine.