Joined scores lose offset information

Lots of elements (pictures, texts etc.) lose their positioning information (horizontal/vertical offset) when joining scores via the album manager.

1) Create two new scores with piano as instrument and some title.
2) Change both titles' positions, giving them some horizontal and/or vertical offset; save both files.
3) Create a new album in the album manager, add both files and join them into a single file via 'Join Scores'.
4) In the resulting file, both title texts have lost their manually changed position.

All kinds of elements seem to be affected; I have tested this with title text, staff text, dynamics, a fermata, a fretboard diagram, a picture, clef sign and time signature; the offset is set back to zero for all of them.

Linux | 2b832e8