Does someone know how to instantiate an .ass file sequence in Houdini that works with motion blur?

Setting a “instancefile” attribute on the points to load geo directly from the network works but only if I don't render with motion blur. Otherwise, I get an error:

00:00:00 1017MB ERROR | AiArrayGetMtx: out-of-range error in src/pygeo/arnold/instancer.cpp at line 604

If I use an “instance” attribute instead and load an .ass file with an “arnold_procedural” node, I can make it work but only if I check “load_at_init”, a parameter I can't get if I load directly the files from an attribute in my instancer. Everything would be easy if I needed static objects but I need a sequence. I tried the “instancepoint()” function in the path of the sequence on the “arnold_procedural” but it always returns -1, probably because that parameter is used inside the node at SOP level.

If anybody has an idea on how to make it works, it would be greatly appreciated .