Sequence chart: New message/call jumps to bottom after creation

[Boron]

Hello,
since a long time (>> 1 year) I have a really annoying behavior when creating a message/call in a sequence chart.
Today it really makes me .

When creating a message between existing messages the message jumps down after creation.
Sometimes it is located at the very bottom, sometimes somewhere in the middle of the diagram.
I always have to move it with press Alt-key to the intended location.

This does not happen the created message is the last in the sequence.
The behavior is the same in EA 12 and 13 (14 not yet tested).

Any idea what might cause this behavior?
Or even better: how to get rid of this?
I do not think this is intended.
A re-installation did not help.

[qwerty]

Does not happen to me. However, I remember some complaints regarding message creation and ordering. You might want to contact Sparx support if nobody else here has an idea.

q.