Switched to extruded meshs and indeed the issue is gone (even with way more curves) thanks for the solutions !
I'll try to make a reproduction case when I get the time.
Thanks again for helping me, have a great day
edit: Sent you a PM with a link to the reproduction case project
I'll try to make a reproduction case when I get the time.
Thanks again for helping me, have a great day
edit: Sent you a PM with a link to the reproduction case project