nightly builds : grace note

When I open a Muse score 1.2 file in Nightly builds when there are several grace note before a real note, only the first one is style in the file .....??????
MSpetitenote2.jpg : is the "original" Muse score 1.2 file
NBpetitenote1.jpg : is the Nightly builds 5654 file

NBtrucageefficace.jpg : is the same Nighlty builds file in which I deleted all the second voice after having had the other grace notes (the trill also disappered) , and that seem also very nice no ?