Flam grace note "sticking"

The first two flams in the attached .musicxml file were input as lyrics, with the grace note sticking attached to the grace note and the quarter note sticking attached to the quarter note, but the "stickings" are stacked on top of one another in both MuseScore.

Is there a way to fix this? Or another way to input the information? It will be converted into notation by OSMD.