Cross-staff beams - second beam detached to the left

When creating a cross staff beam group of notes, I have discovered that the second beam of semi-quavers are offset to the left.
Best thing to do is demonstrate it-
1. Enter the notes into the lower staff

2. Flip the required notes up into the upper staff. Here's the result

3. Ok, lets try the other way round - enter the notes in the upper staff

4. Flip the notes down into the lower staff

Now, I do not claim to be a notation expert - far from it - but this seems to be a bug.
I tried to edit the beam - moving it up or down a bit, changing the angle - to see if it would "snap" the beams into position, to no avail.

Is there a workaround ?