Crash on save after drawing a line with symmetric transition points: in Draw, or Impress.

After drawing line in LO Draw or in Impress, and changing one of the points into smooth transition (or symmetric transition), LO crashes on save with 100% reproducibility. It works fine before saving the file, which allows to export the diagrams, for example. But saving of the final drawing is simply impossible. Unfortunately, without diagram drawing Impress is basically useless for me.

LO version, English
OS: Ubuntu, Français