N6.5 + Frontier Alphatrack + Autosave = Crash ?

Hi all,
I’m on Win7 64 Bit + N6.5.40 64 Bit

On heavy projects (lots of tracks and lots of TrackVersions) I crash N6.5.40 very often.

It looks like if I select a track in the arragement window just at the very moment Nuendo performs an autosave, I get the spinning mouse cursor until Windows tells me that Nuendo has crashed and I can only force the program to quit.

I then have to restart the computer because the Frontier Alphatrack and UAD cards do not quit.

It only seems to happen when the alphatrack is connected and running.

Anybody else experience such behaviour ?

Best regards