nightly builds : some strange beam styles

When I open in Nighly builds "5654" some Muse score 1.2 file
I have some strange beam things...
* ligature.jpg : in the third measure the beam is the whole measure (strange no ?)
* ligature3.jpg : the beam in some of the opposite way (but only one at a time)

(is that linked to the fact that the mouvement is in 3/4 but when I see the measure properties ..... it says 6/8 --> I open a new topic about this....)