Preset morphing crash – Max For Live Forum

Hi,
I made a max for live device that control some parameter using OSC, inside I’m using preset to morph between preset.
I can easily recall a particular preset using automation. But when I do an automation to morph between preset using a simple live.numbox. Ableton Live crash instantly.
Even if I have only one preset.
If I have no preset I can play the automation. And if I morph between preset by hand no problem either.

I did test without OSC connection with a blank Ableton Live session.

Any idea ?