How repeatable are they?
Do they occur at random events?
Are you always online when it happens (or always offline)?
etc.
Sorry for the late response...
I have always been online (best I can remember).
I used wifi to connect for a while, and I 'think' that I may have had less problems when working from a wired connection.
Scrolling the ladder with status turned on seemed to exasperate the problem, but that was not the only time that it happenned.
The crashes happenned at least a dozen times over a few hour period on this job.
I did leave my laptop sitting while connected to a PLC for quite a while, and it never crashed. It only seems to happen if I am there trying to do something.