Issue with the Start beam in Tab staves

GIT commit: de01a4e / Windows7

1) Guitar Tablature template

2) Enter some sixteenth notes.

Expected result : at each new beat (ie the start of beam of a group of notes, depending the time signature):

Actual result : the beam is broken (or is flipped)

To fix this: double-click on Start Beam (in Beams properties), or continue to enter other notes.

Note : by adding a standard linked staff, and by entering notes via this standard staff, you notice this:

Also (ukulele score here:standard staff and linked ukulele tab)