editing region envelop freezes ardour 2.2

Hi forum,
Just compiled ardour 2.2 from svn. The default waveform color has changed once more :slight_smile:
Anyway, I was trying to edit the region envelop in some tracks. It used to work fine in 2.1. But I get systematic freezes in 2.2 when I add new points to the envelop. I can add some points but eventually, pfffff, freeze. It is systematic. Can someone reproduce this ?

hi thorgal, please have a look here: