Hello Bastien,
Thanks much for your answers, and your effort helping us make Knot better.
Sure, if you are ready to send us more report including the journal
files the next time something similar happens, we would really
appreciate it.
Currently I made some bugfix in journal possibly related to your issue,
will be released in next (2.4.3) version. Anyway, I'm not really sure it
would fix your problems completely.
BR,
Libor