Custom formatting in instrument names from 1.3 scores disregarded

1. Open attached score (produced in 1.3).

Score 1:

2. Right-click stave.
3. 'Stave Properties…'.

Expected result:

Actual result:

Score 2:

2. Right-click stave.
3. 'Stave Properties…'.
4. Tick 'Do not hide if system is empty'.
5. 'OK'.

Result: The line break of the instrument name has been discarded.

Note: Originally discussed here .

Using MuseScore 2.0 Nightly Build (1c07b89) - Mac 10.7.5.